Hohn Deere 790 fire! Need parts help!

[bridgeport13b]

As the title says, I have a 2003 John Deere 790 that was in a garage fire, anyways I payed $300 for it and was going to rebuild it. The engine and head is in very good shape. But I知 having as issue finding an injection pump and the power steering and hydraulic pump. I was looking for used parts and wanted to get this running again. Still waiting on transmission, front axle, and engine gasket kit to show up in the mail to make sure everything is sealed up. The paint is bad so going to clean everything up and repaint. Any suggestions on where to find used parts? I知 20 years old and know how to work on diesels just having a rough time finding parts that are not overpriced. If anyone has an injection pump or a bad one that needs a rebuild let me know. Engine is a 3tne84 yanmar.
Thanks
Richard.