Acceptable Clones? Perhaps passed through Gordon?

that project to support the P8

the p8 is long gone, out of sales. The same goes for most of the nrf hackable watches, very few exist nowdays, you are 3-4 years too late.

you are also missing an important point. Espruino is funded by hardware sales. It makes no sense trying to bypass the means of funding. At the end, if one succeeds in porting to a cheap alternative, he will only harm the project. I think this is mostly the reason that very few people will be willing to offer what you ask for. If you want to put some effort, espruino is ready for some 4-5 watches, if not, the bangle.js2 is fine as is.

I'm interested in the "Alternative NRF52840/32"'s that are available.

There are only a few.
52832:
P22 - similar to P8 and Pinetime, can still be found on aliexpress, hopefully still nrf52832
S28 - relatively new find by @yngv126399 https://www.aliexpress.com/item/10050064­04242146.html
both are DaFit so no need to take apart, S28 even has screws so easy to open
52840:
C17/Magic3 https://www.aliexpress.com/item/10050053­73233740.html or https://www.aliexpress.com/item/10050059­35723945.html

And that's about it as far as I know. I also have few spare unused watches still in a box like QY03/P16, DK08, SN80, GW32 or fitness trackers like B5 that I could sell, if you want to experience the older stuff and possibly continue. But as those are out stock there will be no new users except possibly you.