US/North American source for compatible base hardware?

As noted in the README, the existing platform is the Yard Force Classic 500 which comes from a Chinese OEM SUMEC Hardware and Tools which itself is a subsidiary of SINOMACH. Their "Brand" page lists G-Force, Yard Force, and PowerG. PowerG looks to be battery powered hand tools, which leaves the G-Force and Yard Force side of things.

Yard Force USA

The Canadian and US links from the SUMEC page bring you to YardForceUSA.com. They have a Robot Mower product page with two products listed, the RVX4E and RVX4. I can find no mention of these devices being made available for sale anywhere. I've emailed the US distributor and will update if I get an answer back. I eventually found an online shop for Yard Force tools in the US but no robot mowers are listed.

The international page for Yard Force lists different models than the NA page, and that includes a model SA500ECO which bears a passing resemblance to the Classic 500 (as well as being suspiciously similarly named). Amazon in the UK shows this model as no longer available and it appears to be an older 2018 device which they possibly are no longer making.

G-Force

This line is harder to pin down. The product page shows a handful of models, but I cannot find any listings for these mowers on sale anywhere. Product videos I've found are from 2015, so this might be an older line of devices.

If anyone else has any ideas as how to obtain a suitable mower deck in the US, post here and we can all get to hackin'!

Start with the README's description of the Yard Force Classic 500 and review the linked Yard Force and G-Force product pages. Compare North American mower availability and hardware compatibility, then document a confirmed source for a suitable mower deck or report that none is available.