I don't know if it's because I'm one myself which somehow causes them to stay away from me, but it seems like there aren't any around where I am either.
However there seems to be a ton of "type B" tsunderes - heck my Mom, Dad, and sister are ones. (this makes me the outcast with my "type A" and general kuudere-ness as well...)
If you have no idea what I mean by "type A" and "type B", see:
http://tvtropes.org/pmwiki/pmwiki.php/Main/Tsundere