Good sign references?

I noticed this link:

http://mapcore.net/forums/viewtopic.php?p=131388#131388

But most of the images don't have large versions which is annoying. Does anyone know any other good roadsign references and indeed general signs? I already know the ones from Mayan and CGtextures.

Cheers!

Their sign section sucks and I'm not paying for something that I'll be using on a non-profit basis anyway.

Thanks anyway