Do you have an old grooved pulley, and just need a new one, or are you looking for a missing part? If you have a reference part, you can send it to ZPE / griptec (
https://www.zpegriptec.com/) and have them make you a new one. I think even if you don’t have a part and can figure out the diameter and offset, they could make you one from scratch as well.
I’ve had them make me 3 supercharger pulleys and an alternator pulley. All super high quality, reasonable prices, and very easy to work with. I sent them existing pulleys and the results were perfect