fleabay is full of pads. bolts are non no different from anything you can get from a good car parts. Brake pivot axle is as follows, so bare with me and see if you get me.
axle then spring, bronze washer, caliper arm, bronze washer and or plastic washer, caliper arm, washer nut, the domed nut, or in weinmann the other nut which has the plastic cover on.
tighten first nut to hold the caliper arms togethor so they move freely but with no forward movement, hold this nut tight with a 10mm spanner then tighten other nut upto it with another 10mm spanner thus locking them togethor.
Prob best doing this on bike.