Dana has said that if there is enough interest, he will bring back and make available an item that used to be supplied, which is a KMSD-branded Dri-Fit shirt, which he wore in long-sleeve navy blue if you were in class on Sunday.
I believe Dri-Fit is Nike, and wicks away moisture. The shirt looks quite sharp.
Express your interest by sending an e-mail to info@kravmagasd.com (linked below).
I don't know of availability in short-sleeve or other colors, so if that's what you want, then you might mention that.