Ive had great luck with the alterstart one as well(guy from ebay) Ive got both his alternator and mini starter. He also gives you everything right down to the zip ties as well
I went with an autozone one. My 93 came with one, but I cracked it. Can't remember exactly, but it was around $100. I figured it has a lifetime waranty, so I can keep replacing it if I have to. The only problem I had was that it got heat soaked after driving 100 miles on the highway with the longtubes. I'm going to put a heat shield on it this year.