step one find a new gunsmith.
OK now that that is out of the way, you might be able to get enough adjustment between the scope and a set of the old Leopold adjustable bases that were made for scopes that had no adjustments ans can often be found in the lose parts bins in many shops, finding one to match the receiver and holes is probably not going to happen you never no you might get lucky, but given what you said I'm gonna wager this will not be enough, perhaps with shims and said bases you might get enough, but you have to ask yourself if you want a Jerry rigged gun, i would advise to find a better gunsmith and have him do the job properly.
oh I'm going to go beat my head into a wall for a good half hour after this
I decided to do a little checking ot see if anyone still made the adjustment bases when i realized the leupold standard bases have two screws on the rear base, grab a pair and adjust in the direction you need, you might just get it!