Well, it's almost put together - just have to put on Aluminum trim, and then re-hang on trailer. I ended up using Gorilla Construction Adhesive - it's waterproof as well, and it sets up quicker.
My layers are:
1. Original Fiberglas skin, with one layer of plywood still attached
2. 1/8" Marine Grade plywood
3. White foam (since it's 3/4" thick), with 2 Mahogany Strips down the side - talked with my local mill, and he said besides teak, Mahogany was the best for moisture resistance, and I was able to find 2 lighter pieces
4. Inside Surface - in trying to save money, re-used original piece, even though it has a tear in it - something to talk about while hanging around outside kitchen.
I'm planning to use a bunch of silicon, as I don't want water to even get into where the wood is. The drain holes have been there since beginning, and really did nothing to stop the wood from rotting - I don't even think that water that got in can even get to the drain holes, given that the plywood just soaks it up like a sponge. So I want to prevent water from even getting in.
So like the rest of you have said - I basically have a new door - a stronger and more water resistant door, which should last longer. From quotes I had gotten, a new door - including frame (not sure why I can't buy door by itself) - was around $600. I ended up spending about $120, as well as a sense of accomplishment B-).
Also, incase those with outside kitchen doors don't realize this - the door is NOT meant to be used as a roof when it rains - it is not weather resistant. That is what I was told when I talked to the various dealers about getting a replacement. It's also the stupidest thing I've ever heard - who wouldn't use this as a roof when it's raining - it's right there. So if the company were to anticipate the actual use of this product, then just build it correctly. Even if I were not to use it as a roof when it rains, I don't get why they say it's not "weather resistant" - isn't it the outside skin of my trailer/outdoor kitchen? Shouldn't it be weather resistant, given it's exposed to the elements ALL the time? I just hope that someone at Keystones reads my message to them (and this one maybe), and they decide to change the design to make it so this doesn't happen in the future. Sorry, just needed to rant a little, as this shouldn't have happened.
rv46 - thanks for the original post, and the pictures - you gave me the courage to even try this. And thanks to everyone else who posted - great ideas.