I do. Also know why the market is not interested in making something nicer => The price of a portable projector (used) is < 200 dollars these days ... so a laptop + projector combo kind of obsoletes the ol'fashioned demo boards and you can get away with so much more with a computer when doing a lecture.
I do know that the fancy super-GM tournaments in Europe still use them for post-mortems ... so have you tried a vendor over there?
it seems like all the demonstration boards made today are flimsy pieces of crap. They use thin plastic, foam and super thin boards. Looking at pictures from the past they used to have nice wooden demo boards with nice piece shapes.
what happened?
anyone else share my gripe?