Cap Badges: Button shank backs

[Bugbear]

I have used paper clips cut into a U shape (filed to a point on the ends to get through the fabic cleanly). Works well for shank buttons, but with these badges the shank is fairly long so it might be a bit floppy unless some sort of flash, rosette or backing can fill up that distance, or if the shank can be flattened a little..

Thanks, kiltimabar. I am working with buttons, so it would be a lot different. That gives me a direction to go in, though.