That isn't a standard size (lower profile) for a Minor 1000 so few owners will have experience. If you want that size again simply "google" it and see what options come up?
I have 155/80/14 Nankang tyres on my Minor which suit it well and were inexpensive. I bought them by mail order and, again, simply googled the size and bought from the cheapest source. I can't remember now who I purchased them from but there were several options. There isn't much choice of tyre manufacturers of that size but I prefer the Nankang to the Toyo tyre in terms of road behaviour.