I just got a kit from China -
80CC MOTOR GAS BICYCLE BIKE ENGINE MOTORIZED KIT POWER Sea 7-8 Weeks Outdoor New | eBay
I was having trouble finding someone who first had motors in stock, and then who would ship to CA. (Bite me C.A.R.B.!!) Their eBay user name is "sun-thing28" and they ship from directly China. $196 delivered isn't bad for a 66/80cc kit. Quality overall looks pretty good. The motor they sent was an angle plug, not a straight plug like in the pictures. And they must've forgotten to put the EPA sticker on it.
Complete and well packed, and it will take every day of the 8 weeks they say it will. But it looks like a good motor and it's going in my OCC Stingray.
Since I ordered that I got one from PCC Motors on one of their many eBay accounts. I believe it was $139 delivered, but they've gone up $100 since then. Quality is poor, and looks like it was assembled in the dark. Plus it was spray painted afterwards, and I had to scrape the paint off the wires to see what color goes where. I'm going to completely tear it down and rebuild it with American bearings and seals before firing it up.
I also picked up a never-run Grubee Skyhawk motor with a lovely CNS carb and no exhaust for $60 from someone who bought a kit and decided to use a 4-stroke huasheng motor instead. I'm not sure what I'm going to do with it yet, but it seemed like a good deal so I grabbed it.