Bringing this thread back up because of a new resource for these old Dealer Display Layouts. Just saw this in the latest edition of LCCA's "The Lion Roars" and have to say it sounds very cool.
This gentleman (his name is Bob Osterhoff) offers various "paper" train products on DVD and he's just released Part IV which includes Dealer Display Layouts, Original Instructions Sheets for building and wiring, and other information. Says it covers 57 (!) different layouts and totals over 150 pages of content. $18.50 + 2.00 shipping.
I'm still planning which dealer display I want to build so ----- I'm ordering ASAP!
Here's the web site: