If there's no problem with the axle, can't you put a new boot on it and pack it up with some fresh grease?

Get a split-boot and you won't have to take off any more than a tire. Sure split boots aren't as good as one piece boots, but as long as you are meticulous gluing them (and allowing the glue to cure) they will last a couple of years or more.

I don't know if you can get one for this car, but hunt around. It will save you some time and money.