You can find shocks and the prices are all over the map. I have paid too much and also gotten them very cheaply. The difficulty is that you will end up buying some that cannot be rebuilt.
I bought some off of FB that were repros and could not be rebuilt. I was told they were originals and they were not. The seller never owned up to that and I threw my money away.
At least half, if not more, of the old ones out there cannot be rebuilt, either. The rebuilders sometimes have extras. I have four with Robert Paul now getting rebuilt and they should be done soon.