The original color was #381 State Green. There are several sellers but you are going to need a spray gun. Alternatively, take a piece with you to a big box store or even Wally World and see if there is a close color match in a spray can. It will be less expensive and ready to spray. Be careful when removing the window/door inserts - the tabs are very fragile, bend them gently.
The car numbers as well as Pullman and Observation were pad printed on the original. There is/was a guy who made stamps you could use to replace the printing. It is somewhat expensive and tricky to get the long words straight and evenly printed. When I restored my 2630/2631 I created decals on an inkjet printer, fast, easy and cheap.
