I'm goin through that right now with a set of under rider traction bars I'm making.
I went here: http://www.quickor.com/
No size there for me, so I emailed them , no reply. BUT, through www.mercurymarauder.net
I hooked up with Wes at http://www.innovativeinterceptors.com/
who is a Quikor dealer, and he's helping me out.
He's also working on a rear sway bar for my project Mustang.