Here are some of my favorite breeders who I've done business with for hypo stuff.

1) Chris Wofford (SansCera on this site): no website, so just search his username and you'll see crazy hypo stuff.
2) Jon Courtney of Cold Blooded Addiction (coldbloodaddict on this site): His hypo stuff is amazing!
Cold Blooded Addiction
3) Steve Winkler of Steve Winkler Reptiles: I purchased my enchi hypo from him. He works with the Compel line of hypos, which tends to throw stuff with LOTS of purple.
Steve Winkler Reptiles

She doesn't work with hypos as much as the other guys, but she definitely deserves a mention.
4) Kris Hardy of KLH Reptiles: I purchased my first BP from Kris three years ago and also two gorgeous hypo girls that are amazing! KLH Reptiles

So there you have it! Even though I haven't done business with him yet, I'll also mention Brian Breikss of Breaking Balls. He has really awesome hypo stuff and top-notch animals! Here's his Youtube channel so you can see his cool stuff!
Breaking Balls