Could you, possibly, cut some deep oblong tumbler type shapes (all same size) place right sides together with part of the edge,
Stitch and turn back and then do the same with the next strip to the left/right of the first ....
continue all the way round till you reach (and I guess overlap) the beginning ?????
I'll see if I can draw what I mean ....
You could then zigzag stitch or top stitch some narrow ribbon over the raw side edges of the tumbler shapes to finish off ???
Brenda would have to work out the sizes etc ... just a thought.