Golfclubs4cash and Replay Golf are two good stockists of nearly new and used stuff, but you have a very specific ask on a pretty new model, so I would think they are pretty scarce and might not be a hell of a lot cheaper than a new one.
If you can access Facebook marketplace there’s a chap selling one of these, reg shaft and black dot £30 in Brighton - will post too. Your pro can simply alter the lie angle if that shaft is right for you? (I coincidentally saw this before your post when scrolling!)