I don’t think it’s ever taken more than 5 business days for me to receive wire that I purchased online from a bonsai supplier. Also, aside from the one time when a significant branch broke on one of my junipers but still had a section of cambium that remained connected, thus presenting the possibility of saving the branch by acting quickly to wrap and wire it so it would remain moist and have structural support from the wire, I haven’t encountered any circumstances in bonsai that call for emergency wiring.