need new lifters...

The problem is that there is only a few lifter manufactures in the world and they make them for everone, most cam manufactures buy them from one of these. The problem that I saw was theat they weren't heat treated properly, and the replacement set was just fine and had a different production date/code on them, and the engine has been running fine since.
It doesn't really matter where you get your parts as long as you feel statisfied with the company and feel that you were treated well and that they would stand behind what they sell. This is about all that you can ask for.