Someone in another thread asked me to post when I got my new strap set up, so I thought I'd share a picture.
The strap is really nice leather, much more comfortable and breathable than the stock silicone strap. It's really easy to fit, especially if you have a watch pin removal tool, but I did it with the tip of a small knife. It's the 20mm size that the Vapour takes.
US: https://www.amazon.com/BARTON-Quick-Release-Leather-Watch/dp/B01KD8JHZC