I had the same problem and couldn't find one, at least one that wasn't more expensive than searching aquarium websites. I have a Aquatek regulator and had to go with their splitter. Looks bad but functions good. The one from aqua cave was the only worth while one I found too that was at a good price. Hopefully it should work with Milwaukee brand regulator. I never heard from aquacave when I emailed them about the same issue, hope you have better luck.