I bought a bunch at a site called scientific surplus I think its
www.sciplus.com but not sure...they have all kinds of neat things and one was a bunch of bases for those glass domes you buy to protect whatever, they were a buck apiece as I remember..but not sure if they have them now? Won't hurt to try..interesting stuff anyway! Oh about the bases, they have a routed slot where the dome sat , but not a problem, to use for a bird or whatever and if you do a scene on it, you don't see the top of the base anyway!