These people have products or parts that look interesting and might help you.
Modeling
http://www.kadee.com/ No matter what the scale it’s gota be KADEE
www.rrstoneworks.com stone based modeling products
www.trackman.us Tools for hand laying track
www.kamloopsjunction.com bridge and Structure Kits
www.mcwwerks.com Detailed Trestles & Bridges NEW Charma Round House
Dress up your layout
www.myhobbysupply.com Bird houses that can be used in a Garden Rail Layout
www.gtrainbuildings.com Buildings for your Layout
http://www.angelfire.com/biz/gaction/index2.html G Action Models and Train Novelties
they build fully operational equipment for your layout
Build It yourself
www.nemodel.com
www.brewerplans.com Plans for buildings & Bridges
www.lightrailproducts.com Kits to build streetcars & trolleys
http://www.llagastrack.com/
www.nwsl.com motors & gears
Electronics and Control
RR Concepts multi scale electronics for automatic control
www.dallee.com electronics
http://www.track2.com/ingram/home/index.main.iac.shtml
Automatic multi-train control for G Scale plans and pictures good for shows.
Rolling Stock
http://www.h-l-w.com/hlw%20with%20flash.html Hartland Locomotive Works
Ever wonder where to get Hartland products or if you can get parts, here they are
I checked all these Web sites and they were operational on March 6, 2008