I got a few of the Yukon axle kits on eBay, probably the cheapest place to find them. Though I'll never buy from MopartsDealer again ...long story.
The axle kit may be a few dollars more but you'll have a lot better stuff. You can probably sell your original axles for $50.00+ to help recover some more of the initial costs.
My local machine shop was going charge me $75.00 to redrill my axles and drums.
If you have to ship your heavy axles and drums out, it surely will more then double the price.
You should still be able to run the rest of your brake set-up with some LBP drums that match.