Good luck. Taylormade Racing has closed. Their exhausts were never well received here but they still had a following. Have you tried emailing or calling them? They made a neat no-drill shark fin chain guard that I have on my K6.
As best I can tell, Taylor's designer John Keogh is now associated with Vee Two USA LLC at the same address and phone number. I didn't see a website or email address but Keogh ought to know if molds/tooling exists or if a "custom replica" can be made - if you can reach him. That address is really close to Graves Racing/Motorsports. I think of Graves as Yamaha's Yoshimura. There must have been some interaction between Taylormade and Graves.
P.S. Closed my ass! According to the California Secretary of State, Paul Taylor is in charge of Vee Two as recently as 3/17/2020. He just changed the name of the company.