You should be able to go to any auto glass shop (or even a mobile glass company that will bring it to you) and get a replacement (with or without tinting) for around $125. Not something you have to search for at car show swap meets. C3 windshields are readily available. :thumbsup:
If you are concerned with future judging, you will need a reproduction windshield with correct date codes from the aftermarket providers. These are available with correct factory tinting where applicable. If you do not intend to have the car judged, you have good advice from Metalkid.
You can install the new glass yourself - the job is not impossible, but it is the type of job which is better left to the pro automotive glass fitters. Their prices are reasonable, you get guaranteed work, no leaks, and they can install one in a couple of hours.