Wow, that looks like a great option that takes the Oberdorfer and improves most of the (very few) complaints. It looks like they've modified the flange to fit the newer motors that use a 2-screw mount without using the silly screw-on clips. Somehow my alerts for new Sailnet posts stopped working yesterday, so I didn't see your post until after I had already ordered. And interestingly, I've seen nothing about this pump on the C34 Association website. I may post something over there about this apparently new pump.
Here's the thing: I actually went ahead and ordered another Sherwood pump. It's complicated, but there are a few reasons why I became concerned about the Oberdorfer. One is that their N202M pump does not pump as much water as the Sherwood G908. For those who have older (lower horsepower 3-cylinder) Westerbekes, it seems to work fine, especially for those who upgraded their heat exchangers from 2" to 3" wide models, and/or those who sail on the west coast where the water is colder. I have the 4-cylinder 35 hp motor, and the Chesapeake gets to the high 80s in mid-summer. All this puts my boat too close to the limits of the Oberdorfer pump's capacity. There are a few cases of people who report steam coming out the exhaust with the larger motors and/or warmer waters. And this is something that can't be alleviated by just running at lower RPM, because that further lowers the pump's output. I called Depco yesterday for their advice, and they said based on customer complaints, they don't recommend the Oberdorfer for anything over 30 hp - basically for the same reasons I mention. Since they have no other pump to sell me, they had not incentive (aside from honesty) to turn me away.
FYI, the Moyer pump you linked seems to emulate the smaller Oberdorfer design, since they say it uses the same impeller.
Another issue is my belief that the inlet port on my pump is a 7/8" hose barb (not the stock 5/8" barb). The Ob pump has the two screw ports closer together than the Sherwood (since Ob is a smaller pump), requiring shortening the 5/8" barb to be able to rotate it on. A 7/8" barb is even bigger, and I'd likely have to grind off too much to grip the hose properly. All of these are things that I could work around, but it would cost me my entire Memorial Day weekend and maybe another weekend after that, as I am sure I would have to make multiple 100 mile trips to the boat. This same consideration precludes doing a rebuild - that will have to wait until after I get the new pump installed.
Bottom line: This time around I need a perfect drop-in fit, so I got the Sherwood. I'll consider other options later. It really bothers me to spend money on a pump that is considered total crap, but for my motor, sailing waters, and desire to get the boat running as quickly as possible, it's the only choice.