I'm looking for something a little less formal than "yours truly" or "best regards" to sign off emails.

I've seen "cheers" and would like to use something along those lines.

Any ideas?

Cheers / Ciao / See you / Later / Best -- these are in wide casual use. You could probably coin your own if it is meant for informal use among acquaintances.
Yea: Thanks. Exactly what you used in your post here. That's what I always use, even if it may not specifically apply to the topic of the email. It's generic but somehow affirmative; it says more than "bye" or "later" without trying to say more.