I would just do it yourself. Two reasons:
1. It's not THAT hard, and it will give you a good understanding of the internals of your gun.
2. No guarantee that the shop you pay won't screw it up anyways.
Much of a Ruger MK series pistol 'accuracy problem' can be fixed by different ammo. I have seen 'several serial numbers apart', and therefore presumably made by same people at around the same time with the same tooling, pistols get dramatically different group sizes by switching ammo.
One of my MkIV will eat the middle of the X on a NRA 25yd Bullseye target from a rest (rare random flier to a 10) with white box 'automatch' and open up to pick up some 9s with issued Eley match stuff. It will tighten right back up with the far cheaper stuff.
If there aren't any good videos to walk you through it, several of the members that have done it before would be happy to sit with you as you tune your pistol.