toddchat,
A good local machinist should be able to bore and slot your slide. You probably won't find a local gunsmith willing to do this.
Bore the slide to .698-.699, then use a woodruff keyway slot cutter for the bushings locking lug. Order a 1911 match bushing (I prefer Ed Brown) and fit the OD to where you need a bushing wrench to turn/install. Fit the bushing ID for .001" barrel OD clearance.
Then hang on, cause the accuracy is going to be stellar.