The 1L Evernew Pasta Pot (ECA522) is listed on the TD website as one of their standards, and the description does say that a gas canister will fit. Whether or not the Caldera Cone setup “fits” usually depends upon what compromises you are willing to make. Because TD has four different cone designs, and some are more fiddly than others:
The Classic cone lists the ECA522 as a compatible pot, but the Classic usually needs to be carried separate from the pot- it does not fit inside.
I don’t see the ECA522 listed as an option for the Sidewinder, Fissure, or Fusion cones, but I would be very surprised if it were truly impossible to make one for it. There may be compromises in efficiency, but one should be possible, and Rand does always say to contact him to ask. (As a practical matter he can’t list every pot in existence on the website.) The efficiency issue is that the handles on the ECA522 come down quite low, requiring either a low cone or a large side opening. All things considered this is a very minor issue, but if you’re OCD about such things, well, then you are.
Personally, I’d never buy a pot that can’t accommodate a Sidewinder. I don’t like the extra assembly that the Fissure and Fusion require.
FWIW the Vargo 1.3L pot has pasta straining holes in the lid and will accommodate a Sidewinder. It’s popular enough to be one of Rand’s standard packages.
For something smaller, the Vargo 900mL pot also has pasta straining holes and accommodates a Sidewinder.
The Evernew 0.9L ECA252 is my usual go-to pot and can use a Sidewinder, so I like that size but, no, there is no fitting a canister in that one. (In fact fitting the standard TD 12-10 alcohol stove can be a challenge, and I recommend their option for a Zelph Starlyte instead.) But Vargo pots do tend to run almost an ounce heavier than the equivalent Evernew pot. I would just ask Rand about the ECA522 first, if you like that one.