I have a nova g3 with a 1x8 insert that I used on my old delta 46-111

I just bought a Jet 1221 which has reverse.

Is there a 1x8 insert with a set screw available or do I need to buy the g3 version for the delta midi.

I guess I could just not use reverse with the chuck for now but I'd like to utilize the feature for sanding.