I use one of these at the rear.
FireStik SS-204A Adjustable stainless steel vertical door jamb mount Amazon.com: FireStik SS-204A Adjustable stainless steel vertical door jamb mount: Cell Phones & Accessories
With a little massaging, I mounted it where a labrak mount would go without any drilling.
If you really want a labrak mount, I believe cruiserparts.net also sells them.
Hi @LEX - when you say "massaging" what did you wind up doing? I've got the part and am playing with fitment now. Looks like you may have bent it? Did you use both screws that are part of the rubber hatch stop? My bracket doesn't line up with the holes - looks like I can only get one screw thru to mount.
Thanks for any insight.