Wanted: Piece of rock with waving hands

[eternitybc]

Our old tank used to have millions of waving hands (from brittle stars!). We had to tear it down over a year back, and when re-assembled, no more stars

If anyone has a piece of rock with some hands in it, would love to buy to replenish our stock. We don't need any rock though, so maybe a small piece, baseball size or less!~