I stumbled upon this site and was facinated by the photos and content. It is in Japaneese but I used the Alta Vista Babel Fish web page translator to read it in english. The site url is... http://members.aol.com/~satorumas/brands/simplex.html
Babel Fish site is...
Enjoy if you have not already seen it. Looks like where some of the high priced ebay stuff ended up. You may want to go to the very bottom of this page and hit HOME to see what other goodies are out there.