I am switching from IL ARNG to USAR. Where/how can I find a Drill Sergeant slot?

Im a former drill sgt and now a recruiter. Ive been on the USAR side of the house all my career. Talk to the AGR recruiter most larger recruiting center have them, they will sqaure you away.

You will need a 368 signed. I would get the paper work started though.

I know there is a DS unit on FT Douglas, UT that has slots available. Not sure if you wanna travel that far though

You can find USAR unit vacancies on this HRC link. You need to log on with a CAC or AKO. Obviously you need an approved conditional release from the IL ARNG. FYI- if you hold an 11 or 19 series MOS, there are AIT instructor positions in the USAR as well.
https://www.hrc.army.mil/content/Reserve%20Tours%20and%20Vacancies