There's good = $$$$
There's good and fast =$$$$$$
You might find good and cheap
But good, fast and cheap? Probably not.
Having said that, I've heard good things about Mr John's bodyshop in Vaughn. European Autobody is good (owned by the Remo Ferri Group) but will not be cheap.
2009 E92 M3 Le Mans Blau on Schwartz. DCT. RAC RG63, KW V3, Eisenmann Race, AP Racing, Vorsteiner GTS5 Front Bumper, Vorsteiner GTS-V Rear Diffuser.