Hey Mike, ..just a thought, but beside the usual t-shirts n stuff, p'haps some things like red-goggles, eyepatches, red-lights,... could augment the mix, with a lil liason between suppliers/retailers and screenprinters.. ??
(licence the logo!
) ...IIS thermos-flasks, winter clobber... mmm.. isn't there a member who sells that gear?