I do not think the drivers are Fostex. Looking at the enlarged pics, the back of the driver is printed with the text:
"Realistic FE-103"
Does Fostex make speakers for Radio Shack? That would be interesting.
if you're available, would love to see the pdf.
on refinishing, be careful sanding. the veneer is very thin.
I've seen some lovely refinishing done on Klipsch heritage speakers.