Just FYI:

I found out from BMW dealer that they've terminated their relationship with the manufacturer of the E53 OEM hitch, and therefore no dealer in the US carries the hitches. BMW America is working to resolve the issue and is searching for a new manufacturer.

Comes at perfectly shitty time when i needed to get a hitch for my motorcycle trailer for a road trip! Damn it!

I will take the plunge and go with a Non-OEM-- no options at this point.

If anyone has new info regarding this, please feel free to provide follow-up.