I think I was at that track day with my Dad in his 79 4/4 4 seater, it was run by Thompson and Potter..
If either he or you went on track then I may have a grabbed a pic of your car... If you post the reg to me as a p.m. I will happily dig through my pics, and if I have one of your car and you might like to have it, then I will either post it here or have a go at sending it via p.m. if you prefer.. No problemo ... (-: