Good Morning Sir
You might try if you haven't already
www.dieseltuff.com. Guy name is Mark. He used to work at PDR years ago before going on his own. Anyways he set me up with Stage 1 twin turbo kit from PDR just before he left, same turbos you listed above. I bought this kit like 6 years ago. I still have it all. Hopefully next year I will install it in my 91 early truck!