Magnetic Shoe Mount

Okay, I have a pretty niche need that I can't find a good solution for. I film adventure motorcycle trips and cary my FX3 in a backpack. I need to be able to quickly access my camera, so I'm using a Think Tank Rotation 22, but sometimes need to use other packs or cases. My biggest issue is that the mic has to be disconnected to fit in my packs/cases so I have to attach it quickly every time I pull the camera out. Cursory googling has given me basically nothing, so before I start modeling and 3D printing something, has anyone seen a magnetic shoe adapter with both the male and female ends? Ideally I just grab the mic and set it on top of the camera and it just clicks into place. It doesn't need to be particularly strong/sturdy, just needs to be fast.