
I think if you do that, given he is already uncomfortable, the cue 'touch' will just come to mean 'something you don't like is about to happen'.
I would forget stacking him for now, get him happy around people, happy to ask people for physical contact, but do NOT have people bribe him or trick him into physical contact.
Stick with getting him comfortable in a variety of locations (home, outside, ringcraft), and getting him happy about inviting people to touch him but NOT when stacked.
If needs be you can enter some open shows when hes old enough, and just ask before hand that the judge doesn't go over him, hes just there for the experience of the ring and standing in it.