WTB- drift anchor / pyramid anchor

Looking to set my yak with a drift boat style anchor system and need a source for an anchor...I know somebody out there pour's 'em, anybody point me in the right direction and give a recommendation on weight?

Gracias,
Ben

I don't pour them, but I can weld a mold together for you. I don't think it needs a top, just a pyramid shape. If somenbody can come up with a measurement, we can get'r done.