Thanks all. I think I`m certain enough that it`s a 2-piece seal to order the proper pan. Trying to get one more month of boating in, I may try some epoxy putty as I found the leak. Right hand side, about 1 inch up and back from the deepest sump portion of the pan.
Original paint on most of the pan except for spots, so I`m hoping the whole think will last another month, or a bit longer. Hole is too small to see, but if I wipe it dry, after about 2 or 3 minutes, a little weepage shows up.
After I get it out of the water, I guess it`s time to fire up the chainsaw and cut some spruce trees for a scaffold of some sort (actually, I`ll use sawn timber and bolts). While I`m at it, I`ll probably get the starter overhauled as it`s another thing that is almost impossible to change with the engine in the boat.