The part numbers for mouse sander contour attachments are:
- Contour base piece - part that slides onto pointed end of sander (after removing the tip) to attach any of the three contour pieces: 490651-00
- Contour attachments fitting on the base of the contouring base (set of three): 376622-01
You can purchase packs of Velcro paper to cut from http://www.shopandtools.com or can purchase rolls of 10 yards of Velcro paper from http://www.onlineindustrialsupply.com/ . You can also cut any sheet of Velcro paper to fit from Lowes, Wal-Mart, Home Depot, etc.