The New Suzuki Quadracer HQ Welcomes All LT500 Quadzilla, LT250, LTR450, LTZ400, LTZ250, LT80 owners to the Suzuki Quadracer HQ forums
First that's not a wheelie bar it's a grab bar, second I imagine you could just weld a looping piece of medal onto it but my advice would be learn how to not flip your quad.
http://www.suzukiquadracerhq.com/index.php?action=store