Hi John,
I do not know of any facility, but you may want to call BCS and see what they have to say. I seem to remember a conversation that I had with Sean at BCS about slide alignment and I think he said if it got out of alignment it could be caused by one of the rack and pinion gears jumping a tooth. You seem out of alignment side to side possibly causing the binding. I think he said that they actually jack the slide up and realign the proper gear teeth if that happened. This is a vague recollection so you may want to talk to the folks in Bend.
We will be in Bothell for the month of July if you end up that way,
Later Ed