Yeah, Toaks sells several nesting sets depending upon the size you want, and they make a damned good product. I’m quite certain that their largest nesting set will fit the fuel canister. Since this one has the same diameter of smaller pot I’m pretty sure it would work as well. They list measurements for their pots, so it isn’t hard to figure out. (Or just call them and ask.) Those 115mm diameter pots equate to about 4.53″, and IIRC the largest brand of stove fuel canisters (Kovea?) run around 4.33″. Most are more like 4.25″, though. And I’ve seen JetBoil and MSR cited as 90mm (3.54″)- I think that most manufacturers are going to that as a standard because it’s what will fit in the most common and incredibly popular JetBoil stove stand, and they want to poach market share from JetBoil. So I don’t think any of the Toaks pots smaller than 115mm will fit a canister over 90mm. In fact, I strongly suspect that Toaks chose 115mm as one of their standard diameters for this very reason.
If you really want the smallest pots possible you might try this Toaks set, and assume that everyone is indeed going to 90mm fuel canisters, but I can’t guarantee it.
Evernew has a number of pots that can be nested as well, of course. I’m not sure if they actually sell them as sets, though, so you might have to research a bit to figure it out.