GOT PARTS?

Im just curious if there and scrap parts to any us rail equipment like maby a freight wheels and trucks maby a SD-40 frame Below are some examples http://www.railpictures.net/viewphoto.php?id=346974&nseq=56http://www.railpictures.net/viewphoto.php?id=345997&nseq=61http://www.railpictures.net/viewphoto.php?id=245774&nseq=339http://www.railpictures.net/viewphoto.php?id=244807&nseq=349