The owner's manual is available at the Singer site. Use caution purchasing a vintage buttonholer, you'll need the slant needle one. Cam sets and etc are often found on 'that auction site' or local listings, or more often than not on the Goodwill auction site (search for: sewing). The 'full' attachment box had several slant feet, 6 (?) cams, screwdrivers and et cetera. Here's
a link to a pic.