When in doubt keep searching...
I mounted my Shindengen to the same spot where the old one was (using just one bolt). The connectors interfered with the tool box under the seat. A few minutes with a dremel, and it fit just fine. The MOSFET units can be left under the seat, since they don't heat up, even after extended rides. I butt-spliced some 14 AWG teflon insulated wire from the alternator to the Furukawa connector, and wrapped the bundle in some polyester expandable tubing. This got rid of the white plastic spade connectors that are often a failure point.
Looks like this is what I may end up doing. Good thing I don't use that storage spot.