When I visited the U.S. a few years back, the first thing I did was ring Snap On and find out who the local dealer was! He was as delighted to sell me some stuff as I was to buy it at about half u.k.price, at that time!
Reading this forum, some Snap On dealers are obviously wary of selling to someone who isn't 'in their area' as that's a big 'NoNo' as far as Snap On are concerned! But if you find the right dealer for the area, any 'walk in ' trade is a bonus! Call Snap On and they will probably put you in touch!