The supermax option would be great but they are based in the US so not easy for us in Europe.
Supermax are very easy to deal with no matter where in the world you live. Most people in Europe receive their modified pulley back within 2 or 3 weeks. However, you will still need an old alloy pulley to send them which they machine down before fitting their polyimide overlay.
Fabian tends to make his lightweight steel pulleys in batches so you should make sure that he knows of your interest if you want to go down that route.
In my opinion, either of those options are a lot less hassle than trying to get one made yourself.