When I checked the other day they didn't have 29 gauge in stock! So maybe that's why it will take so long? My local B&M sells wire at $1/foot, but you could probably buy enough of 30 gauge to tide you over till the Temco order arrives.
I ordered from the TEMCo site, so that was probably a huge mistake, this is what my order says:
Kanthal Wire 29 Gauge RW0169 - 50 FT 0.25oz Series A-1 Resistance AWG
Shipping: Ground - $0.00
Shipped in 4–5 weeks