If you can order through a LBS, that would be a great option, especially if US distributors still have any mounts in stock. Cycliq’s been having a lot of supply chain issues due to the pandemic. I ordered a camera through their Black Friday Sale that was supposed to ship in January 2021. That’s been pushed back several times, most recently until May 31st. A lot of accessories they sell through their site have listed anticipated shipping in June 2021.
If you’re open to alternatives, I’ve had a good experience using the universal adaptor that came with the Fly12 and using a GoPro-style thumb screw to attach it to various handlebar mounts. Using the universal adapter and a thumb screw gives you a much wider selection of possible mounts, many of which you can order through your LBS.