I think I have a decent sway bar set up.

I used sway holders from my Xray T3 2011

http://www.amainhobbies.com/product_...Holders-T2-008


Some parts from a Losi Ten SCTE sway bar kit.

http://www.amainhobbies.com/product_...-Bar-Kit-Ten-T

and I bent some 2mm music wire. You can even use set screws and yes the bumper clears. I just finished the front and will do rear tomorrow.