Yoshimura RS4 fitment with aftermarket head pipe

I have decided on the RS4 because I have to have a real spark arrester on it they check where I ride.
I am doing the ultimate air box mod, de smog , EXUP is going bye bye.
Fuel will be handled by PC V with auto tune.
So what I need is to find an aftermarket head pipe with a 02 bung already place that will fit up with the RS4 with no abrasion needed.
I only have a 8 x 10 shop only can handle bolt on stuff.
I live way out in the sticks of Mississippi getting something built takes an act of congress.

Thanks for your time guys.

Tim

Bump

bacon, did you ever find a solution? Or can someone else on here answer the question for me?

thanks!