yep i tried to order the top snap on ones online once but they gave no guarantee that they would fit.
I would think someone could cut them open a bit more for you, bit by bit till you get the easy fit you should have.
my Q Snap frame comes with top snap ones that have ribbing inside. that helps prevent the quilt from moving and helps keep them on. the original one i bought didn't have ribbing and was worthless!
this ad at JoAnns tells about the ribbing.
http://www.joann.com/joann/catalog/p...PRODID=prd2867