I have a set of all three mandrels for that deck, not really "lying around", I took a deck apart to fix it, but I think I have 3 or 4 complete decks, so it sat off to the side, and still does... I think the bearings in the one I have are smooth but a little noisy. They don't have rusty spots in them, like a lot do, but they probably were run pretty dry before I got the deck.
I may be willing to sell them, but I can't give them away too cheap since that really is the main mandrel that dies in a deck...