I’ve been offered a 3rd Gen but unfortunately a teenager has been messing around with it. He was trying to open the rocker cover and hammered a screwdriver through the gap breaking a rocker arm valve. I don’t know how many so all of them would be great. If not, happy to buy the head if cheap.
Picture below:

Sadly if we can’t get the parts, it will scrapped.
If you have them, please let me know.
Thanks