FWIW, while await backordered replacement pannier.
1.) Trying the ViaTerra Claw Mini, 48L saddle bag. $100-ish on Amazon. Nice design, well made if modest zippers/material; not cheap, but not heavy duty.
Granted you lose the pillion seat soace, but for a weekend solo trips it has worked remarkably well. Just the right size on the Rocket, not obtrusive and hanging all over creation. Have been tying it down to the pillion rack mounts and pillion seat rest, very tidy no goofy straps running all over.
The lonely left pannier can mount simultaneously, so actually could carry quite a bit for camp or whatnot.