[Cool Hand Lurker]

Some of the foreign cars have a vacuum assisted servo clutch that you should be able to adapt to the Model A clutch pedal linkage.
There is a self-contained unit from Mitsubishi that might fit right in (Photo 1) and there is one on Ebay for $79.99 right now.
Or you could use a Mercedes vacuum actuator that would adapt to the Model A linkage (Photo 2) and VW has a vacuum canister servo (Photos 3,4,5) that could be mounted near the clutch fork arm to actuate the clutch.
I have not tried this but I think it could easily be done.