We saw golf stuff EVERYWHERE! The most stuff, of course, was at the pro shop at the golf courses but there is golf stuff like balls, polos, pens, mickey golf bobbleheads, etc in just about every big gift shop and each hotel gift shop.
(my DH recently took up golfing and golfed 2x last week at WDW and we stopped at every.dang.golf.item we found while shopping)