This was a little more complicated than I would have thought but it all worked out in the end. Here's what I had to do. I bought a spare spindle from micromatic:
Here's what I'm working with:
So I took my spare spindle to a grinding wheel and came out with this:
I then removed the gas from my Guinness keg and disassembled my stout faucet, removed the old spindle and inserted the new one. I used a dial caliper to check the height of the pin hole on my spindle a new I would be slightly off so I reassembled my faucet and before I put the bonnet on I added an extremely think metal washer to take out the play in my new handle. Here's the result. An American faucet with a European authentic Guinness handle:
I now get a great pour and a great looking faucet/handle combo.