Goodmorning SK, welcome!
I have found that most avid collectors, just like the lovely folk here at ACF do not easily nor want to get rid of some of their most funkiest plant. I have only been able to come accross a CPM at the local markets along with some TBM, and alot of people suggested that eGay is your best options, but then I think from my terrible, terrible memory one or two of the online vendors possibly carry some now and then but I would imagine that they get snapped up pretty quickly.
If I had the spare money or if you do, DEFINATELLY hit up HN's TPM X SS02 on eGay.
Who knows, you might end up like me and probably end up meeting like minded cacti folk in your area and find some gems rather easily.
End of ramble, lol.