brake booster problems

I gonna run 20's on my hb and i know i got to change the brake booster and i have heard the geo metro's work but is their anywhere i can get one ,or an universal one thanks guys

junk yard dealership down the street on the fat girls car she might have one jokes any 7" booster should work im going to use a ford courier booster with its remote mount resivoir

thanks man

anyone else have any suggestions or photos?