I have one left NIB that I found in a hobby store in Arizona once when I was there - the store was having some sort of special sale, don't know if it was going out of business or what - but they only wanted 65 bucks for it, so I couldn't pass it up.

I used to have 4 - counting this one that's never been run. Now I have three, plus a spare muffler & carb.. the rear bearing let go on my best one, trashed the piston, sleeve, and the head isn't too great, either. The case and crank MIGHT be useful, but it was cheaper to buy the 65 dollar whole engine.

I'll have to admit, I never looked at the instructions that came with them. Maybe they've been ABN forever, and tower is finally calling them correctly..