Intelli used to have one by me, but they changed the rules, and then they recently stopped offering the shuttle service part that was the main component of the shop.
In the past, I would always try to combine it with my hotel shops I flew out to.
The answer is the same for all the 'who shops who' questions; You gotta be signed up with all the MSCs and keep a lookout for airport shops. The clients and the MSC's change all of the time....but last I saw, you have to park and depart the same day for that particular national parking lot that does get shopped. I'm sure there are probably others, though.