I've got a set of JRA built, posted lower down. They are 35mm but otherwise exactly what you are after. I've run 2.4, 2.6 and 3.0 tyres on them! WTB Aysm rims, JRA hubs, £225 posted. Excellent condition only used for a few months. E-mail for pics.
I may be selling my Hope Pro4/ Enduro rim set up - 142mm rear, 100/15mm front - Orange hubs - currently has a Shimano free hub but I also have a Sram one - let me know if you want pics