I've got 20+ pairs of home made prolex ears, they're not perfect and probably not tourney legal, but you can have a pair for £3.50 posted (they don't come with screws though, my skill stops at the ears)
I have a pair of tourney legal JT mini ears with screws and a choice of straps (Red Old school JT, Red tribal 06 JT, Yellow Old school JT) for a combined fee of £15 so if Jarheads aren't suitable for some reason let me know.