I promised an update. I was able to get my hands on a 12V FSI distributor that Mel Mallory had modified for a customer who had experience multiple almost immediate (within a few miles) ignitor module failures. Mel had installed a small diode on the red lead that goes from the module to the positive (+) terminal on the coil. The diode is an IN5404 that is readily available on line or at Radio Shack. It is installed with the silver band (cathode) orientated toward the distributor module. In the photo below, I have peeled back the heat shrink tubing to expose the diode.
As noted in my initial post, I had two similar almost immediate failures. I installed a diode as above, and have been driving for several days now with no problems. My friend who let me check out his modified distributor, has been going for almost a year now.
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