I cant tell you what the axles weigh, but I can give you a way to get "pretty damn close" on the sprung versus unsprung weight if you have some time and a set of corner scales.
Weigh entire vehicle on corner scales and record all weights. Then raise the vehicle, preferably with a commercial lift or two large floor jacks could work also. Raise it up until the all four tires are just barely off the ground and set the vehicle on jack stands at that height. Now raise it up a bit more and put the corner scales under the tires, but dont raise the jack stands up any higher. When you set the vehicle back down on the jack stands, all of the sprung weight will be resting there and the unsprung weight will be "hanging" down onto the corner scales.
Of course is not as accurate and taking everything off and weighing it but with the total vehicle weight and the weight of only the tires touching the scales, you should have a pretty damn good idea of sprung versus unsprung weight.