1.You can still find 126 mm spaced wheels or hubs but, of course, they limit you to 7-speed freewheels/cassettes. Hunting around older bike shops is likely to turn up an NOS 7-speed hub they will be thrilled to sell. Here is one source: http://www.thethirdhand.com/index.cg...d=685024715651

2. You can remove a 4 mm spacer from the nds side of a 130 mm wheel and still use 8/9/10-speed cassettes but the dish will be excessive. You will have to cut 4 mm off the axle to keep the axle ends inside of the dropout faces.

3. You can get a 130 mm wheel, replace the 8/9/10-speed freehub body with a 7-speed body and trim the axle.