Sure, Lurecraft and a number of others. I got most of my molds and injectors from del-mart many moons ago. Great molds, but I'm not sure they are in business anymore. Canycreek molds as well. I've got probably 90-100 bookmarks to various suppliers, but I'm always trying different places hoping to find one that keeps up to date with current trends, etc, most recently trying the following.
Bearsbaits
http://www.bearsbaits.com/
MakeLure
http://www.makelure.com/products.cfm
Watch the boards at tackleunderground for a while as well for whats trendy and new. Most of the more popular suppliers are sponsors and linger around responding to folks there as well.
I find it a very rewarding craft, but be careful. Get good gloves, ventallation, go slow, and practice with small amounts first. Watch you tubes on pouring, you'll pickup on some good practices and see a lot of bad ones as well. Scolding hot plastic will leave nasty burns and noxious fumes can be, no are, hazardous to your health.