Subscribed...
There are whispers here and there about Harness Bar's, but no one has stepped up with any solid information on availability.
There is one in BMW-M Mexicos RS 46 from RD Sport, see link below, scroll down to find interior pics. I PM'd RDSport last week for info and have so far not received any response.
Vendors?
http://www.m3post.com/forums/showthr...169232&page=39