^ I think it would be quite easy to put it back in place though, as no parts has gone missing. I'm not sure where to go for repair, they need tools for the tiny screw. A drop of tightening fluid could also prevent it from happening again..
Oh no! You might go ahead and try to contact Proenza Schouler and see if they'll fix it, otherwise, can you slide the screw back in the hole it came from? maybe you can glue it in there with metal glue?
I remember when the PS1 first became popular, a PF user's clasp had broken. And she contacted Proenza Schouler, I believe via E-mail, and they fixed it for her for free.. and sent her a free wallet. So I would try contacting them right away.
did you ever manage to get this fixed? I am sure a good repair shop could do it for you. They'd probably have to take the piece of leather off, redo the screw and then put the bag back together. Should be possible.