Rear ends on non-disk Humus were 110mm, 112mm, and 120mm. All are variations on old-school track or BMX spacing. My A'ha is 112mm with a perfect "track standard" 42mm chainline. This limits your rear hub choices to BMX, track or older dirt jump bikes (DJ bikes now all seem to use 135mm disk hubs). So the options are somewhat limited unless you go upmarket to Phil Wood, Campagnolo Pista, Profile BMX (drool) etc. Or put a screw-on freewheel on a narrow old road hub. Maybe Surly or On-One do one? Alternatively, go to Alans BMX: He has some old-school BMX hubs that will do the job and look the business.
So, just so I get this right, I need a rear hub with 112mm axle (and 32 hole). Indeed, the options are limited and it doesn't help my PC doesn't want to play ball with the Phil Wood site (I can't check what they have for some reason).
Something like this?http://www.ebay.co.uk/itm/New-SHIMANO-R ... 231b4732bf