That was going to be my suggestion, too. I've made them with the full width of the fabric in the middle and a matching length of the same fabric cut down the middle to make the sides. The french seam is not as complicated as it sounds and it makes a nice finish that will keep it from raveling.
When I made my last one, I didn't like the underside of the quilted fabric so I used the wonder under to fuse another fabric to the underside and then used blanket binding all around the edges. (Wonder under doesn't gum up the needles)
It will be beautiful and fast no matter what she decides to use.
Hugs,
Sharon