The stock beetle gas pedal will work .. no problem there. I am trying to get a better deal on the M/C's before I order the assembly.
I'm also looking at duplicating a 'Remote Mount' M/C assembly .. this is basically a mounting platform that houses the 2 M/C's with bias bar and adjuster, and has a solid rod that connects to your stock brake pedal. You can mount this assembly on the front beam (or any other suitable location) and then replumb your brake lines and add the solid rod from the balance bar to your stock pedal.
This pic is from the Wilwood website.
Benefit is cheaper cost (only 2 M/C's to buy) and you use stock gas, clutch and brake pedals, so its very stealth.
I'll probably go this route as I can weld up the mounts ising 1/8 - 1/4" steel plate. My welding and fabricating time is free.
I'll do a tech article when its all done .. I'm just finishing up the design now.
Sandeep