I'm pretty sure the R32 handbrake mount is the way to go. Probably better to weld it in rather than drill and bolt. There will be a hole in the trans tunnel for the cable to pass through, it has a plate tack welded over it and is filled with some silicon rubber stuff. If you get rid of that crap first, put the cable through the hole and bolt the cover down, that will give a good indication of where to mount the handbrake lever on the tunnel.