On One Pompino owners...

If you're going to splash out £150 on a hub, you might as well run the sprockets at 10-speed pitch, get 7 of them on there and use modern shifters. That way, you could use the spidered-together big sprockets off a modern cassette (e.g. CS-6700), which is also cheaper than the custom-spaced Grand Bois 6-speed.

Any options for this? I wondered if it could be done with a hope pro3 hub shell, single speed freehub body and a custom axle but I'd rather buy off the shelf.