LRI will do custom contours....it will take longer than the standard offerings. I had Chad machine my last one as a custom.Criterion are the only folks that I am aware of where you can specify the contour up to 1.0" and the barrel length. LRI is a 6 groove as opposed to the factory 5R.
Proof Research now makes barrels for the RPR I have one on order. Have heard good things about most of them. I don't really think you will go wrong with any one of them.....
I know that's an older post. So update. I just ordered from Krieger a prefit, Factory chamber, factory contour, 26". $550. My stock RPR barrel went south right at 2100 round. MikeWhy not go with a Krieger one of the top barrels out there, , buy a blank have a good smith finish it, some keep 6.5 in stock like Bruno shooter supply