Not sure what you're looking for, external WG or internal, but I have a GN1 DP that uses the 38mm external wastegate. It's the same one that Mark Hueffman sells on TR Custom Parts. It is used, but in pretty good condition, with one ding from the pass side control arm. This DP may require some trimming of your pass side inner fender depending on how old your motor mounts are, and whether your inner fender is cracked etc. Let me know if you're at all interested, and I'll post/email some pix in a day or so.
Sincerely,
John A, Turbohh