My bet is that you could customize an order for an NPHC chapter if you had a large group interested!

I love my Tri Delta spirit jersey, but my university bookstore also sold jerseys with just our university name and motto, and when I was involved in club sports, several teams got personalized orders for their sport team. They are so perfect for vacations :)

Somethinggreek.com is selling them so you could get it made for practically any group. Only thing is that they start off at $75 and you have to order a minimum of 6, but the more you get, the cheaper they get.