Greenhorn to the site need 420 help.

The rear end on my 420 finally failed. I tore it down today to find everything is pretty much destroyed.

The spline on the rear drive shaft at the pinion gear is stripped. Thus drive shaft will need to be replaced. The pinion gear as well is tore up. The ring gear is scrap metal. All the bearings/seals/o-rings...pretty much gonna need a whole new rearend. Any body know wher I could get a whole assembly at a good $$$. The axle shaft was not damaged. Any help from you guys is welcome and would greatly be appreciated. Thank from the dirty south!