I asked the seller about a frame number, but they are out the country at the moment and thinks when they checked before the paint was too thick to read it.
If someone on here gets it, I would be interested to know the format. I think it might be four digit, rather than a classic Toyo format...
The frame for the 1989 is pretty special. Someone can correct me if I've got this wrong, but I'm pretty sure it was fillet brazed by Masaaki Ishigaki (founder of Toyo).
The Ozark had at least three paint schemes. White to red fade, red to black fade and an orange-yellow-white fade which I think was a mid-year scheme before the new bigger lugged rage replaced them.
Avanti - a white to turquoise fade, a black to speckley grey/white, and a yellow/black Team...
There's an Airnimal Chameleon up for sale on Ebay at the moment:
https://www.ebay.co.uk/itm/204768850036
A bit tatty, but seems like a (relatively) good price.