I've found each wire at different suppliers. I want to have both to try in a new TC mod and saving the extra shipping would be nice.
the TI wire, grade #1 is listed at the bottom of the page and comes in 30 & 32 ga, i been using the 30 ga doubled and twisted in my drill, they also have Nickle
https://theringlord.com/cart/shopDisplayCategories.asp?id=3&cat=Wire
sorry about that i should have read closer about the NI........the TI Grade#1 is awesome tho
Zivipf in germany. As far i can tell, there the best resistant wire seller on the market. Funny nobody in US seems to know about them...
They sell different gauges of wire for Ni200 and TI, plus 316L, 304, Kanthal A, Kanthal A1, Kanthal D, Nichrome, Nichrome ribbon, silver... Plus Mesh, ceramic wicks, genesis rope, ekowool and braided silica. I suggest you also to give a try the Fiber Freak, it's a kind of rayon, but far better. Their muji cotton sucks (like all cottons once you tried FF ).
I don't know about the shipping cost to US but for Belgium it's nothing close to the prohibitive prices of USPS. They use german post but also a private carrier, i think.
Resistance heating wire - Zivipf Onlineshop