Try kingsnake.com - classifieds - geckos. I have personally purchased WC from Steve at Reptile Depot in SoCal. They ship FedEx overnight. On the east coast, Glades Herps down in FL has carried them. One of my laticauda breeder pairs has produced three clutches so far. One has hatched out, one is in the incubator at 37 days, the last was laid yesterday in the sansevieria leaves under their basking spot. I will be moving these eggs to the incubator this evening. If you do not have room for a basking light, try to make room. The small puck lights sold at major hardware stores work well in conjunction with flo lighting.
-Adrian