Start with this, for the oldest ones 2000 to 2008 (these are web only versions; there were apparently no PDF's at this time):
https://ogrforum.ogaugerr.com/...0#155293810638721640
Actually the above link will take you to a thread that helps with Weaver catalogs as well.
As was implied above the newest ones are in PDF form. There are specific URL's for these. If no one else posts them I may do so later this morning.
Mike