In the big US online stores (like Element Vape, if I recall correctly) there’s no wire, only replaceable coils, but there is cotton. I’ve visited a few physical shops, but I didn’t see any DIY building supplies. Whoever uses that stuff, buys it from Asia just like we do… I think.
When I’m there [in the US], I only buy VG from Amazon… I brought wire and cotton from here.
Speaking of which, I was able to vape even at a -30°C apparent temperature with 96% VG liquid 