None of the three companies below, Ask for Morris based in Scotland,
Might Minor from Yorkshire or Rooster Racing from London exist any longer and these ad's are all I know of them.
Minor Mania are of course still going and of the two 6 wheelers shown the pickup is still used by them, as for the other and the saloon and convertible mentioned I dont know if they still exsist
The adverts below show some of the sense of humour of Grumpy's these date from when they were based in Oxford the old building at the bottom being the original premises, they later relocated to Todmorton in Yorkshire and finally ceased trading around 2004. They were known for their replacement engine steady, heat shield, quarterlight & roll over welding kits amongst others although some of these have been re-introduced by another of the current specialists.