I'd be inclined to just get a little liner for her with only a few flat pockets, that should do the job. My liner has totally transformed my roxy, Bayswater, Mabel and new bays buckle.... Good luck.
Sure you will love it, here's the link to the thread in case you missed it. There's loads of before and after pics. They transformed all our saggy bags. I have six now and they've all been brilliant.