While I don't have a tripod for sale, I can recommend the GorillaPod Focus. While I do have a real CF Slik tripod, I found it very cumbersome on the backpack. It was always getting caught on things. For my last 2 OS trips I used the GorillaPod Focus and it didn't cause any problems with the TSA.

This one is small, cheap and easy to manage on the backpack. I didn't have any problems with it get hooked up on something.

http://joby.com/gorillapod/focus/

Also take a look at the version with the ball-head.

Hope this helps