I've go a pair of Mavic hubs on Mavic SUP clincher rims, currently with an 8spd freewheel
OR
Campagnolo Nuovo Tipo hubs on Mavic G40 clinchers with 6spd freewheel
OR
Gipiemme Special hubs on Saturn clinchers with a 6sdp freewheel.
Obviously non are currently 7spd but all could be! Let me know if any strikes your fancy.