It would be a lot less expensive (and probably faster) to make your own custom quilting surface. Here are links to a series of Youtube videos by Marguerita McManus that show how to do this using foam insulation sheets from the hardware store:
https://www.youtube.com/watch?v=g14govA4pIM (table part 1)
https://www.youtube.com/watch?v=yAS25v3ZTk0 (table part 2)
https://www.youtube.com/watch?v=A0lk7UBQgZY (table part 3)
https://www.youtube.com/watch?v=hwrA6m9tw-A (table update)
https://www.youtube.com/watch?v=hbmQ...F28BF9&index=4 (ergonomics)
Edit: I modified her directions to make a smooth quilting surface to surround my Bernina on my cutting table because I prefer quilting on a domestic machine while standing up (much easier on my back and shoulders). Works really well!