Hi,
first here is a direct link to the mentioned Deutsche Reichsbahn version of the BR 98.8 (former bavarian GtL 4/4) in N, which was also in use on several Lokalbahnen in the 1930ies:
http://www.fleischmann.de/?viewproduct=894&pid=17&trackgauge=5&label=1&equipment=0&epoch=3&query=&onlynew=
one kind of a small bavarian 'Haltepunkt'(= train stop)-building, which can/ could be found in several areas of Bavaria at some Lokalbahnen/branchlines is this 'Agentur'-building by faller in N:
http://www.faller.de/start.php?lang=dt&naviUp=3&naviDown=3&dat_artKat1=SpurN&page=detail&dat_artNr=212105&back=menues_dt/backs/liste_SpurN.jpg&new=0
Not as good detailed like the former version in H0, the Pola's kit of the stop 'Rothhausen', but maybe you like it.
Several more new Bavarian station and train-stop kits in N you cand find at MBZ Modellbahnzubehör Thomas Oswald/Microplanet:
http://www.mbz-modellbahnzubehoer.de/
Edit: Bavarian stations/stops are the kits of 'Kulmbach', 'Dorfen', 'Fürth am Berg', 'Kraiburg' (the later Waldkraiburg), 'Aubing', 'Massbach' and 'Nordheim vor der Rhön'.
Most people havn't noticed it, their more of one hundred H0 building-kits (prototypes of several german areas) can be ordered since last December also in N, Z, TT and 0. It are kits by laser-cutted special carton (only one or two building kits are made by the classic photo-realistic printed paper = "Fotorealistischer Bastelbogen"). The download catalogue ( PDF 17 MB) with all the kits and pictures of them is here:
http://www.mbz-modellbahnzubehoer.de/assets/plugindata/poola/05_2007%20MBZ%20Katalog.pdf
In the download area of the site you can also find the price list for customers = 'Endverbraucher Preisliste' , but it's password protected. You just have to send an email to Mr. Oswald asking for a password, an he will send you an actual password back.
Example for the prices:
The little Bavarian station 'Massbach' in N i.e. is 50,64 Euro, the also for H0 brand new kit of a typical Bavarian cube station, in this case 'Kraiburg' in N is 85,92 Euro.
By MKB-Modelle is also a Bavarian Lokalbahn-station available , it's 'Wasserburg/Stadt', as a laser cut kit in H0 :
http://www.mkb-modelle.de/product_info.php?products_id=3146&modelle_id=d0ac4195dff03da55cb46a13b057fdaa
It's also announced for N, a prototype kit of MKB in 1:160 was test-builded by Frank Kaminsky, see his report on his website
http://www.wasserburg-finescale.de/03-Modell/body-fortschritt20070116.html
His website
http://www.wasserburg-finescale.de is about Prototype of this Lokalbahn and building N-modules with that topic. He is also writing, in his history about this lokalbahn, that the BR 70 was operated also there from the 1930ies till 50ies, see -> Geschichte -> Fahrzeuge:
http://www.wasserburg-finescale.de/02-vorbild/body-Fahrzeuge.html
Because you need only less coaches for your topic, maybe also a brass model kit could be interesting for you. Schlosser
http://home.arcor.de/lok-schlosserei/ has announced for N the DRG 3.class CLbay 02
http://www.lbforum.com/images/Messe%202008/CLbay02AN.jpg , which also was operated on Bavarian Lokalbahnen . He has also announced in 1:160 the DRG combined 2.class/Post BPostL bay 02 , see
http://www.lbforum.com/messe_2008.html -> Schlosser. I don't konow of this combined coach also was operated on Lokalbahnem in DRG-times.
The H0, TT and N brass kits of Mr Schlosser are not only famous because of their excellent details (which is exspected by brass models), the parts are really very precise, here a DRG/DB BDid 21/ BCid 21 model in N
http://home.arcor.de/lok-schlosserei/bilder/modell/n/bcid21.jpg (most pics on the Schlosser-websites don't shows the excellent accuracy) and a prussian PwPosti -kit
http://www.lbforum.com/images/Messe%202004/N%20Railino%201603A%20preuss.%20Post-Packwagen%20PwPosti%20Pr11%20pic1.jpg build by Railino, , and the criticisms by model railroader about building the kits are usually very good.
Dirk