Thanks. I have not figured out why that link did not work, but here is a working link - https://www.amazon.com/dp/B0874DJ287/ (I always strip amazon links down to just dp/number)
Interesting idea, to just use a high-quality hotplate. Took me a minute to figure it out. Where do you put the stuff? Oh, you can put it in a stainless steel pan on top of the hotplate. And what is this magnetic stirrer? Looks to be optional, and I assume you would not use that for the RSO. Might still be a bit high for me, but might wind up getting it. ---(editing an update a few minutes later)--- looking at other similar items on Amazon, many options for "industrial hotplates with magnetic stirrers". not understanding why the stirrer is magnetic. seeing a lot of pictures with the stirrer on a stand. I assume the plate rotates. and still assuming the stirrer is optional or not used for RSO. I might get a cheaper one. and I guess I should look at regular "non-industrial" hotplates, but I guess we want the precision on the temperature.