I get so many clip and fastener calls a day. Problem is, like these clips, they require steel tooling/molds. Even having them done in Asia costs real $. Then MOQ's (min order quanties) usually START at 10,000pcs. Could be $2-3,000 min to make that clip and then yiou'd have more than a lifetime supply.. Thats why so many clips aren't reproduced. Doubt there will be any technology in our lifetimes like 3D printing that will make it any more cost effective.