Barrel lapping?

[trex]

Is it possible to have the barrel of a Remmy ML lapped? I bought one last year from a friend of mine. He didn't take real good care of it. It's got some fouling in the bore which is making it shoot all over the place. I wouldn't have bought it, but I was caught in a bind and didn't have a gun since mine had gotten stolen the year before. Wish I never got it, but at the time I thought I could do something w/ it. How much $ are we talking if it's possible?