I got my Kanthal from jugheads, though I only got the cotton wick from him. Looks like Canvape has better pricing on the silica wick. You'll save money from buying through one, just on shipping.
Gauge for 2-2.5 ohms....hm, it depends how many
coils you make, and how thick the wick is. 32A kanthal is 1.1 ohms per inch, and I have 3 different rebuilds now ranging from 1.6 - 2.9 ohm. I don't count my
coils though, just wrap and test with a multimeter. I use a VV so getting exact ohms every time isn't as much of a concern. That said, get a multimeter to test
coils.