Any Parts crossover between Dart and Polara?

If the Polara has an 8 3/4 they make a great axle to have shortened. Too long to use as is (56 3/4" flange to flange), but the axles aren't tapered or stepped like other 8 3/4 axles so not only can the housing be shortened, the axles can be shortened and re-splined to match.

Given how much A-body 8 3/4's cost these days, and what most yard's charge for rear axles, it might be cost effective to have it shortened.