nope, i found a guy who makes them but he wouldnt tell me for obvious reasons.
im sure if we all out our heads together we can work it out.
from what ive been told
it plumbs in the turbo hose the same, the hose that comes out the top goes into an amal valve, and then into the brake servo pipe.
the amal valve is triggered by a switch of somesort on the throttle.
quite how you do the switch on the throttle i dont know maybe someone can shed some light on this.