I just spoke to TAP Plastics in San Leandro/CA and they said they could fashion a 2" thick acrylic platter that is flat top/bottom for just over 100 bucks (112.50). That sounds almost too good to be true. Anyone else tried TAP?
Of course, I would have to then take the piece to a machine shop to drill the hole in the platter as I do not have a full sized drill press to do such things.