I don't remember the names JB Young or Crater Lite, though it is highly possible that I made the molds which produced your bullets. Anyone can make bullets from LBT molds an sell them under their own name. Or, I could have made something custom for the producer. --- Or it is very likely that I've had no part of it as there are many mold makers.
If you send me a sample bullet I can tell you if it is my design or if I'll duplicate it for you. However, I will rarely duplicate other peoples designs, as I consider most inferior to what I sell, and can give solid proven reasons why after looking at the design of interest.