Many details will depend on year of manufacture. Besides Google, check the search icon here for threads about them, and check the info on the boat makes page, also here at Trawler Forum.
You may also find an Ocean Alexander owners website.
Internet Archive may also have old makers ad pages.
Beyond that, you will be looking at the makets of the subsystems used in building and repairing the boats, like engines, transmissions, electronics, etc.
Pictures and info can also be gleaned from adverts for the sale of these boats. Boats.com, Yachtworld, Boattrader.com, and others can help you see what is out there, and at what prices.
Good luck with your search.
JohnS