Mount gopro to rear of bike - varia radar is already on saddlebag

I have a varia 515 radar on a mount attached to the back of my saddlebag. Can you recommend a mount or mounting option to add a rear camera? I’m not going all in with the next version of varia with integrated camera since I already have a camera. Anyone glue a mount under their saddlebag. My seat post is D shaped, so the round mount isn’t helpful. Yes, there are lots of things getting in the way of this working, so if anyone has a thought, it would be greatly appreciated.

Thanks in advance for any help you can provide.
Barry

I bet you could get the KOM varia seatpost mount and a quarter turn go pro mount.

https://komcycling.com/...s/garmin-varia-mount with something like this https://www.shapeways.com/product/F6ZD5E6WL/gopro-garmin-quarter-turn-adapter-mount

The KOM mount is great and I use it with my varia. I haven’t used that particular quarter turn mount.