...It could easily be worth the price of a ticket to fly to the east coast if I could get some replacement hatches, ...
Have you considered rebuilding them? I had quite good results with my hatch rebuild project.
The original cast aluminum/Lexan hatches were leaky and ugly. A previous owner had tried brush painting them and applied a mess of caulk on the outside of the lens. I had to put electrical tape over the seams as a temp means to stem some of the leaking.
In 2011, I pulled them both off for rebuilding over the winter. First, I disassembled them down to their individual components and brought them to a custom auto body paint shop for powder coating. If you do this, it is important to tell them that the pieces need to be baked overnight to drive out moisture. Otherwise, the finish will acquire a pitted appearance as tiny bubbles form and break.
Next, I ordered some scratch-resistant UV-resistant Lexan from McMaster-Carr. Using the old lens as a template, I used a router with a template bit to cut out the new lens. Instead of using screws, the new lens was attached with Dow Corning 795 adhesive (an industrial adhesive, not available in Home Depot, etc). This eliminated the screw holes, which were a major source of leaking due to cracks formed due to thermal expansion and contraction. The black 795 is extremely sticky, and requires an extensive amount of masking to avoid accidents and achieve a clean looking result.
Lastly, I applied new gasket material and rebedded the hatches, using the same Dow Corning 795 and more masking. For a uniform black finish, I also spray-painted the tops of the mounting screws with black epoxy paint.
I was quite pleased with the results, and the hatches have been leak-free since then.