There are - the trouble is finding the right size - reckon they may do them in that particular diameter that would fit . Then the trouble is in gluing 32 pieces... one, by, one :D
Thanks. I was hoping there is some kind of weighted base you can stick to the bottom of the chess pieces.
None that are economically viable I'm afraid. Also none that are very practical because it'll involve repeating the same process 32 times on a small piece which needs to be put upside down (possibly via a clamp of some kind?). You'll need the weight to be the same size as the base of the piece otherwise the balance would be even worse. So, perhaps a side project for someone who already has the tools and stuff and the interest to follow through. Best option is as per my original suggestion to buy a set of weighted pieces for just over a tenner and then get a cheap board (or pricier, higher quality one) for the pieces.
Buy a gravity enhancer.