Hi, and welcome to JA!!
Yes. What you are looking for is a 6 gang 3 phase meter. There is a meter and breaker for each unit
The bad news is, there is no economical way to buy it. They are pretty expensive and almost always have to be ordered. I would start here:
If you are willing to use a used unit
I can send you a link to an electrical salvage company
ok, let me look around a bit
are you needing 100 or 200 amp, and are you ok with something used?
I am having a hard time finding anything as well. If a 6 gang 3 phase model can be found, it would almost definitely be a special order, and very expensive. If space is not much of an issue, I think the way to go is to put a long wire trough at the bottom, with a disconnect and meter above for each unit.