Being somewhat impatient, I decided to move ahead with my version of a drill press table add-on. I had a piece of 3/8" thick aluminum cast tool plate 12" x 16" that seemed to fit the bill. It was previously used as a sliding table on my tablesaw and although I would have preferred something a little thicker, this stuff ain't cheap and I already had it, so the math was simple.
Here is a picture of the existing drill press table...

Here's new table mounted on top of the old one...

And a picture underneath to see how it is secured...

And for now, I'll clamp a piece of angle aluminum on for an adjustable fence...

That fence is a bit bulky and will probably be replaced with something small eventually. You might also notice that I radiused the corners and all the edges since I seem to have an increasing tendency to run into things, particularly sharp edges, as I get older! :big:
Chuck