I tried the one-transistor circuit attached below from Bowden's Hobby Circuits but could not get it to work, probably because I didn't have the right trimmer capacitor and used a fixed 30pf instead. It just wouldn't start oscillating for me. Tried several different watch crystals too, that did work in the CMOS version, but no luck. Tried 2n3904 and BC337-25, no luck.