Another three, 2 from UK and 1 from South Africa

https://racecarsdirect.com/Advert/De...-chassis-10-52
https://racecarsdirect.com/Advert/De...formula-junior
https://racecarsdirect.com/Advert/De...junior-1956-f3

I love the wording in the third one:
"massive torque from methanol burning Triumph 650 twin power unit"