I would drop a used axle in there instead of rebuilding the 10 bolt. It would be a lot cheaper and if you are semi mechanical, you could probably do it yourself in your driveway. You can pick up a used 10 bolt of craigslist or the junk yard for a couple hundred bucks. Or you could put in a 14 bolt semi float axle under it. It's a lot more beefy than the 10 bolt and will hold up to more abuse. They are scarce but can be found.
Either way, it's your choice. I just wouldn't invest a grand or whatever in a rebuilt 10 bolt as I don't have a lot of faith in them. However, if you spend the coin to get it rebuilt, it would probably come with a warranty which is a plus if you go that route.