I grabbed it off Amazon here:
https://www.amazon.com/dp/B002PSB77U/ref=cm_sw_r_awd_4Kqlvb12VDYX7
If you are the impatient type, you can pick it up at any major craft store in the jewelry making section. It is Beadalon 22ga square stainless steel wire. Comes in 24-18 GA, I have both 24 and 22 to play with.
/u/turdplosion
(Edited to tag another person asking)