Maybe this is old news, but I just heard the news from Lonnie at Creamtone. I just ordered a custom bumblebee harness with metric pots for my '81 LS120.
Yup. I received metric 500k CTS pots for my Epi a couple of weeks ago. Spotted them on eBay and ordered them from Philadelphia Luthier Tools. Going to do the 50s bumblebee wiring thing.