Paul,
I sold the Worcester sign back about 7 years ago. Sorry.
Most of my items are found at auctions, flea markets and antique shops. Ebay and Craigslist used to be fruitful but not much anymore. The railroadiana show in Gaithersburg, Md. also has provided a bunch of these items over the years.
Now, who's coming over to help me move this stuff to the new house?