No, pretty sure Greggo does not have one the big difference is the metal, Moto's is stainless steel. Chris was an engineer for Yoshi, and builds this replica.
Carpy's is steel, will rust if not coated. He has them made in IN in bulk. Good pipe for the money but then you need coat it, ceramic would be best, but expensive.
Dibbs on TEWS Kerker!
Tews - the guy who bought my K5 put a Carpy pipe on it, I'll send you a pic.