11-Lean was good. That would be great if they would get it back. They also had 7-oxo in bulk powder which was good, and they seem to no longer carry.
PA stated he can't get the raws to make 11-KT, not that he couldn't get 11-Oxo. It could be that he didn't use 11-Oxo to create the 11-KT because it may be easier to get from another source, or maybe there is something necessary for converting the 11-Oxo to 11-KT that is unavailable.
Having said that, the Platinum 11-Oxo is WAY over priced. Even XI-KT which would certainly be more potent was over priced for the results you'd get. And keep in mind, the OP is asking about 7-Oxo which will require NO PCT, but 11-Oxo and 11-KT may require some mild PCT.