SC&C actually has the most competitive pricing on many of their parts too. I have bought much of my gear there, great service too.
For brake upgrades you can go low buck upgrade with larger piston calipers, and S10 rear wheel cyl, and slotted or drilled/slotted rotors. Huge upgrade for around $500.
Check out Guys' thread(s) ^^, he has one on the larger calipers
Not sure what amount of vaccum your engine produces, but you could look into a hydro-boost swap in from a 2500 pickup with the SBC, you could shave off some $ on the project, leaving you more $ for other suspension, as brakes can get $pendy real quick.
SC&C has several brake upgrade options, and you could also check out Kore3.com, and flynbye.com, you can relatively easy get a bracket from flynbye and adapt C5 brakes (13") on the front.http://www.flynbye.com/catalog/c7_p1.htmlhttp://www.kore3.com/products.php?cat=11
Flynbye is a small owner-run company, you could experience a delay in response sometimes due to the holidays.