I think the wire gauge is 32. You can find it but it will be on a roll and likely cost much more than a few elements. The early elements were 16 ohms. Some of the repros are 18-20 ohms and don't smoke as well. The ones from Jeff Kane at the Train Tender should be 16 ohms. If you get one that reads more than 16 ohms then you can unwrap a turn or two if you are not satisfied with the smoke output.
Pete