Try these
http://www.basketballrefshoes.com/index.html (direct) and also available at
Ultimate Patent Leather Basketball Referee Shoes: Ump Attire.
I've worn them for about four years now....probably the best shoes [for me] that I've reffed in so far...after trying Converse, Reebok, Nike, and New Balance.
Note that the lighting in the picture on the Ump Attire site is a bit odd. The soles doen't look grey under normal lighting as they do in the picture.