I have the mounting ring for an SW-Motech EVO tankbag system. Bought it used without a bag thinking I would look for a used tankbag to fit it and then lucked into a tankbag that came with the tank adapter, so this one is now excess to my needs. It has the electrical contacts to work with the SW-Motech electrified tankbags, but I don't have the cable to connect it to a power source and SW-Motech seems to have sort of abandoned that concept, so you could pursue this or not. I had it mounted on a '14 F800GS Adventure and it may fit other models, I'm not sure. With the mounting hardware - longer screws and standoffs.

$50 plus postage, which should be less than $10Click image for larger version.  Name: DSC02633.JPG  Views: 54  Size: 4.72 MB  ID: 374255