I do already have a few of those Profile mounts. Never seen those Fourier bridges before. Cool. I'm still annoyed I sold my spare Zipp clamps and I don't want to take the bars off the Kinesis.
So, I actually look for the whole aerobar setup to stick on the MTB's flat bars.
Would either of these work? Probably the bottom link
https://www.tredz.co.uk/.Profile-Design-Universal-Computer-Mount_5942.htm
https://www.ebay.co.uk/itm/324607188304