Theres a few. Continental make tires in this size as do Michelin, IRC, Hutchinson, Vredestein etc. However a lot of the tires are geared towards racing and don't hold up to well on city streets. I have a Conti Gatorskin that is doing a champion job.

Larger SF LBS seem to have one or two tires at most, though most have tubes. Most of the large online retailers have them.

Oh and stay away from Kenda tires, sounds like they're not the highest quality. Mention this as theres a 650c version of this tire.
http://roadbikereview.com/wheels/tir...4_2489crx.aspx