Best source for leather seat covers?

Anybody know a good place to get replacement leather seat covers? I noticed a crack had developed on my drivers seat just above the power seat controls. I'd like to just replace the just the lower cushion cover and not the whole seat if I could as the rest of the seat is almost like new. I bet this would cost a small fortune thru a dealer for OEM covers and I've seen a lot of aftermarket makers only sell whole seats or even pairs as a minimum. Should I just keep an eye open on ebay? Any help is appreciated.

Thanks,
Gipper

Well, after searching the net for reasonable OEM seat covers I've come up empty handed. Looking at the seat, I think the side where it tore is vinyl?? The crack isn't big enough to really peel back and look, but I can just barely see what looks like a white cloth backing which means vinyl right? Has anybody used a repair kit for a small crack, and if so how were the results? I found a website called Leather Magic that sells a vinyl repair kit for $30. May give it a try.

http://store.coverking.com/
i bought the leatherette seat covers for my s10 2 years ago, got a lifetime warranty, and no one who rides with me can tell they are seat covers. the fit is super snug. price is a little high but well worth it.