Not simply custom meat-packing plants, but rather rental freezer space for households that don't have a larger freezer? Do some grocery stores perhaps offer this as a service I've never known about? I remember going with my grandmother to the "meat locker" in her small Iowa town, to bring home cuts of meat they'd stored there - probably having purchased a beef-quarter or side.
I think it would be great to have a place here in the metro area that rented out freezer space by the cubic foot -- I could get a lot into a space the size of a lateral file drawer. I did a quick search but came up empty.