http://www.clag.org.uk/
Just ran into the above site. It's the Central London Area Group (CLAG). I was looking for electrical wiper ideas for my On3 2-6-0, NPC #13.
Boils down to this: Years ago I was into wooden ship modeling and found that the Brits are probably the best when it comes to model engineering (scratchbuilding and high end modeling). The CLAG site has some fantastic references and technique we can all learn from.
The site also has a great listing of links to manufacturers, parts and supplies...most for Non-U.S. equipment but I'll bet there's some material that's very adaptable.
Enjoy!
CraigH