Hey, Tom, please disregard the Private Message I just sent you. Didn't realize you were using the OTS for parts. My bad.
Yes, if you can get the ash sweep off of the 93 OTS, you should be able to use it on your Performer. Be *very* careful backing that thumb screw out, because if they are rusty at all they are very easy to twist off. Get some WD-40 or PB Blaster on it, and let it soak in really well. And/or consider using a propane torch to put some heat on the 'nut' to loosen that up.
Yeah, I think many of us will be looking to re-use 7409s from older grills in the coming years. That's a smart move, Tom.