Thanks everyone. I ordered the rebuild kits last week for a total of $50 shipped. Sounds like this might be a somewhat average price. I've ordered a few other things to try and get them to last longer. Will have to monitor them closely and see what happens. I want this done before Sebring, as the boots are in poor shape and it's a very LONG drive down there from Iowa!
I appreciate the links and offers for discounted pricing. Sounds like there will be better options when it needs to be done again.