Hang in there, there are some times you have to walk away and have a smoke and a Coke, and think about the situation. I just bought a 50 1/2ton project and I may run into the same problems with rust, but have the determination to restore back to original, and as my wife said, I have many years to work on it! think of it as long, long term and it will work. I have finding some floor panel parts on ebay recently, you may want to post a "wanted" ad here for parts, or on ebay, sure that you can find some! Have fun, it's what its all about!