Does anyone know of a top plate or "female adapter" for making custom top cases using the Monokey system? I have a Monokey rack with nice plastic Givi top box for daily commuting but would like to build a Pelican top box for trips. I've been researching Pelican case mounts (like Caribou and DIY kits) but that means I'd have to remove the adapter plates each time I switch boxes. Is there top plate like thing I can permanently screw to the Pelican (or really anything else) that will snap into the Monokey rack I already have? Google has turned up nothing but I can't believe this doesnt exist already. Does anyone have any experience with such a thing?