I got my hands on some Dark Elves for Warmaster recently. Wanting another hydra, but not wanting to pay "real hydra" prices, I purchased http://ironwindmetals.com/store/product_info.php?products_id=7988 to see if it'd work. After all, its a 25mm item!
Well...hmm. It's a bit small :P
makes me wonder if I shouldnt have tried http://ironwindmetals.com/store/product_info.php?products_id=8130:
And I REALLY bet http://www.15mm.co.uk/products/hot35-giant-hydra would work:
Still, I'm really only out $7 :)