I just dug out my first piece of Lionel - the N5c Pennsylvania caboose from 1953 (First year of issue) It's in pretty bad shape, but I'd like to replace the worst of the broken parts. I just cleaned off the wheels and the was a thick layer of gunk on them (who says metal wheels on metal track don't pick up dirt?) I need new end platforms and a new coupling. Where is a reliable parts source? Are the wheels supposed to turn independently on the axles? One of the side frames is loose. Can this be tightened or does the whole truck need replacing? How do you get off those U-shaped clips that hold the trucks on? This car has been in storage for about 40 years, but I'd like to run it with my wife's Polar Express.