I did order the 15W version. It was probably overkill for one camera, but more capacitors help to stabilize output and since space wasn’t an issue, I’d rather just have it work. The 5W version of the board claims to support 5W stable and 8W transient, which according to this post seems to be plenty for even two v2 cams daisy-chained. https://forums.wyze.com/t/wyzecam-v2-real-world-power-usage-test/5240
The boards themselves arrived on time per eBay shipping estimates, I think they took about 2 to 3 weeks.
You’re welcome!