Make your own jump rings - including really big ones - in sizes 10, 12, 14, and 16 mm. Instructions on back. It's pretty simple really. Thread the end of a length of wire through the hole in the handle, it takes up to about 18 gauge. Hold in place with one hand, and wind with your finger in the big hole with the other. Slide coil off, and cut with either a jeweler's saw or flush cutters. Assembly required - you need to screw the handle on. ;-)
By the each.