That part # XXXXX't show up.
If the belt has a clean break, you can take it to most auto parts stores and they have a tool that will tell what thickness and length and then match it up.
Also, alot of times on these old vehicles it's hard to find a belt by application and what we have had to do is take a piece of rope about the same thickness as the old belt and wrap it around the pulleys to get an exact length measurement. Works well.
If you have further questions feel free to reply.