I personally know the builder who made the stroker and he's still around and willing. It just comes down to demand. The piston/rod combo are VERY impressive. Im guessing to say they support 800+ bhp? He went so far as to change out all the tangeless bearings to a locking type bearing.
Gutz:
If your still salivating over a 6.0L stroker, ask Lex and he'll take care of you. Anything is possible.