Strat o Matic tray playing surface is currently for sale on Ebay (http://www.ebay.com/itm/272229910247?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649) ending on May 8th, 2016.
Tray has a mdf base, thin layer of cork(glued), original playing surface(glued) from SOM and wooden walls. Vintage signage is printed on index card stock and glued to the painted walls. Four padded feat are on the bottom of the unit to keep it from marking up your table.
Total build is approximately 17″ wide by 11″ deep by 2″ tall.
This was the first attempt at building something like this. While looking at SOM setups, I was surprised to see how many people still use the original board to roll on. My goal was to build something that would be visually pleasing, while keeping the dice on the table.
If you are interested in something similar, please get a hold of me at my contact page.