threaded does not = 1"

however, most threaded 1 1/8" forks were on mountain bikes when 1 1/8" was developed for strength but threadless hadn't caught on yet. i doubt you are going to find much of any selection in the 1 1/8" threaded department. i would be surprised to find hardly ANY road 1 1/8" threaded forks.

a much better bet would be to get a reducer headset and run a 1" threaded fork if you are set on running threaded. as far as i know, the only headset that converts from 1 1/8" to 1" is the king devolution, then you have to buy the conversion kit to go from threadless to threaded. or you can buy what is in essence a shim from jensen and then press a regular 1" threaded headset in.