Got an Arsenal converted 7.62 Izvhesk Saiga a year ago, hand guard retainer doesn’t have a sling loop, looking for someone who can swap it out for me. In Nashville area, willing to do a lengthy drive to drop it off.
Not the closest to you, but I was asking as similar question late last summer (a shop that could remove the handguard retainer without destroying it), and was referred to Helix Gunsmithing, which is in the Top Gun shooting range in Jefferson County, just south of St. Louis on the side of I-55. I went down and talked to them. They said they could do it and had AK tools on hand. I think they said $125.
I have not taken the rifle back for the service yet.