Who made Mopar Performance Hydraulic Roller Lifters P5249862 for Mopar Perf?

So, I've not been successful finding "Who made Mopar Performance Hydraulic Roller Lifters P5249862 for Mopar Perf?" Pretty sure MP did not make these. I'm looking to build a 1990' 360 LA roller block 408" with hydraulic roller cam/lifters. Want to retain factory Spider and Dog-bone guides.
Thanks, TED