I've just started getting into pouring my own stuff. Have yet to find any place locally that sells any of the supplies. Would love to hear it if so!!

I've purchased some stuff from Lurecraft online they have pretty decent pricing and good quality stuff.

I have used Barlows Tackle out of Texas for mail order stuff. https://www.barlowstackle.com/Default.aspx
Cabelas carries some. Not sure if the stores have it in stock. http://www.cabelas.com/product/fishing/tackle-craft/tools-molds/pc/104793480/c/104776380/sc/104635980/do-it-colorant/1970100.uts?slotId=5
Also buy your glitter now... http://www.foxnews.com/science/2017/11/29/scientists-call-for-global-glitter-ban-to-save-environment.html

Last year at the Saltwater Sportsman Show in Salem, a guy was doing a demo of homemade soft baits.  Molds were made from plaster usually after he either did a 3D print of a bait or whittled something out of wood to make the casting.  Purchased bait molds work too, but DIY costs less.  Colorants he used were from ball point pens (any pigment color worked - blue, black, green, purple...).  The plastic was Plastisol sold from Lurecraft I think.  Heated in a microwave.  BAM.