I would find someone tired of cleaning spokes and work a swap. The important criteria is the dimension from hub center to the rotor, axle size, available thickness and diameter and rotor config. The easiest solution is go with an America Spoked Hub, it's a straight, plug and play crossover, everything is where it needs to be, specially that really important functional front brake fork mount and correct rotor placement. EBay has new 21 x 1.65 silver rims that calls for a 36 spoke config for $150 and incidentals. Be safe.
