I used a hydroboost that I got on ebay from a 99 Chevy of some kind for about $100 with master cylinder. It leaked, so I replaced the main seal, and it still leaks...
I ended up using an undrilled hydroboost mounting plate off ebay and drilled the bracket off the factory brake booster to mount to the firewall.
Seems to work okay though, but I haven't actually bled brakes nor did I change where the linkage mounts to my non-hydroboost brake pedal.