MF manufacturing and Lureworks have a nice selection of colorants.
MF manufacturing link here pouryourownworms colorants
Lureworks link here lureworkscolorants
There have been one or two occasions when I used lurecraft.com because they had a specific color I was looking for lurecraft
I've heard third hand that the owner of Bear Baits is recovering and anticipation of reopening the online store is pending. However, I heard that a couple months ago; so wishing him health and recovery.