The International CBX Owners Association

For a custom build I am looking for a throttle tube and cable set. Standard cables are too long and require for me to use stock throttle tubes.
I asked on FB and got varying responses. Bought a drz400 cable but the pull side is way too short.
What are my options ?
I am looking for something that fits a Yamaha R1 / motion pro xm2 style setup

I think motion pro will custom make them.

Thanks. Does anyone know how much free length is required for wires when they are pulled all the way on carb side (push and pull)