Hi Dan and other forum Members,
Ilya Friedman of Hotrod Cameras manufactures a custom 7D modification (and soon 1DMK4) that allows the use of ALL PL mounted cine lenses. He also does a panavision adapter, and I've also seen a BNCR mount that he does for GH-1 (and maybe the canons some day too).
I also happen to have one that I purchased available for rent if you only need it on a short term basis (hope that's not cosidered advertising). I'd be comfortable discussing mine off board at info@dankanes.com if you need.
If you want to order one from Hotrodcameras they are for sale on this site:
www.hotrodcameras.com