Earring modification--clip-ons to posts?

[a-starstar.livejournal.com]

Hey grrls! Could you help me brainstorm ideas for turning a clip-on type earring into a "standard" earring? My friend came to me for help and I'm not quite sure.



This is the earring in question:



http://atashi.files.wordpress.com/2008/10/item6330_1.jpg?w=500

and she wants it changed to something like this one:



http://www.hellocosplay.com/images/macross-frontier-sheryl-nome-earrings-0.jpg

but it doesn't really matter how I go about it so long as it looks approximately like this:



http://static.zerochan.net/full/01/37/106851.jpg

The earrings in question are for a Sheryl Nome (Macross Frontier) cosplay-type outfit, but she also wants to wear them casually, so I'm thinking they need to be fairly sturdy and not too much of a pain to get on and off. Just putting the loop over the post-part might not work for her . . .

The easiest thing is probably to find a green stud earring like the one in the second picture--the kind that has a loopy thing for attaching stuff? I can't seem to find one on my own; do they have a special name? Any other ideas? Thanks a bunch!