With the help of Adam242 was able to source most of my missing keys. I can type now! I'm still missing the tab, ctrl and left shift keys. My 800 has the yellow plungers for the keys. These keys are not interchangeable from the gray plunger keyboards.
Please PM me if you have any of the missing keys that you are wanting to part with.
I bought what I thought was a parts machine, but turned out to be in great shape and works perfectly, other than the keyboard missing some keys. Is there anywhere to source the missing keys? This machine is so nice, I'd like to restore it.