cam regrind

i'm looking for info on regrinding cams. cam in question is a gen 6 hyd roller gm #12551622. 225/225 483/483 icl 109 lsa 115.5 . my questions are how big can this be made as a hyd roller ? can the lobe sep be tightened up to a 110 or 112 ? and is it possible to turn it into a solid roller. the cam is billet. i thought i saw a post where someone said a regrind was 80 bucks ???