Hoping that someone can offer a suggestion on this: I have an old (25 years?) Craftsman lawn mower - not sure the model but I think I can find out. The mower runs like a top, but the deck is on it's last legs - ie: rusting. Is there such a thing as new replacement decks available or does it just not make sense because it would be cheaper to buy a new mower? I'd pick up a used deck if I could find one, but I suspect that any used decks of the vintage I'm looking for are in similar shape to the one I have already. Thanks for any suggestions.