Today we broke the drivers side, rear axle.  We have several questions that we hope someone can assist with. (1985 Westfalia, Bostig with AW high top)1. Can we replace this ourselves (yes, mechanically handy and have general tools)?2. Should we replace both or anything else while we are in there?3. Where should we purchase a new one from?4. Details, tips, secret handshakes?Thanks,Geneva and Mike(Prescott, AZ)