OK - so I've been burning to build something from scratch for a while now. And today, on QRP-L, I think I found the answer.
Chris Trask N7ZWY published an article about a one-transistor CW transceiver for 40 Meters, called "The Gnat". Here's the link to the .pdf with all the details:
Looks like I'm gonna order a few parts that I don't have from either Mouser or Jameco; and then I'll get to building!
73 de Larry W2LJ