There's tonnes of these and the r2 and vadar ones all over u.s ebay just now & has been for years mate, there's certainly no shortage.
There was a shipping case of 6 of them on recent for buy now $24.99 plus $20 shipping to the uk. I think theres a case of 6 r2s on just now for around the same price.
Cool things though, I've always liked the quirky stuff. Been meaning to get some of these myself. 8)