First off, what kind of car is it?

You don't say what part of the world you are at but do you live where there are "Pull A Parts" type places nearby. If there are go there and cut one out of one of their cars and splice into yours. Get as much wire as you can reach when you get the one out of their car just in case you need it).

I would at least try a bulb before replacing it though. Clean it up good with electronic cleaner before you try it and replace it with a bulb purchased either from the dealer or this website. Good bulbs are not cheap anymore.

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Jim