I think POF MP5 parts are available here if that's what you mean. Whole rifles I doubt it.
You can find a bunch of HK G3 and Mp5 POF parts at RTG.
I'm pretty sure I got a POF MP5 slimline handguard since it doesn't have a date code just the mfr. date. You are right though, their stuff is very good. I believe their Collapsible stocks and some other parts are even better than HK.