[Daisy]

I would really recommend that teams put a list in their pit of "We Borrowed/Borrowed from Us" items so that everything is returned. I know at the UTC regional we had borrowed an Ethernet cord, but we had forgotten who it was from, and I had to chase their pit down. It took a long time.

Maybe you could ask teams individually who were at those events through their websites, or something?

A simple piece of paper can do a LOT of good.

I hope you find it,

Daisy