PCB Design Finding Part Equivalents
I'm having trouble finding the part in Eagle

You don't find parts in Eagle, you make them.  By the time you carefully vet a part made by someone else, you could have made it yourself.  Then it will adhere to your conventions for BOM attributes, documentation layer, assembly drawing, etc.

Would a higher voltage rating work as well?

This is a very basic electronics question, separate from your Eagle question.  However, yes, capacitors must be rated at least for the specified voltage, but can exceed it.