Dan,
I will be installing the Groco SA 1250 strainers in my 1967 31' FSA. I removed them from the parts boat and am presently getting ready to install them. All the rubber gaskets were old, hardened and probably wouldn't seal so I am replacing them. I was able to find the strainer kits from Marine Parts.com. The part numbers are GROSA2. These strainers do not have the seacocks included, but the gaskets may be the same. Here's a photo of the SA 1250 strainers.
Another rigger had installed the galvanized street ells, which may be ok in fresh water, but the hose barbs are some kind of poly...? that looks like it was whittled down to fit the engine water intake hose. These are coming out and I have 4 - 1 1/4" bronze elbows on the way with the strainer kits.
You may find parts for yours in one of the marine parts sources. I'll post a note when I get the parts and find out how they look and fit.
Mike