Volva Penta TAMD40A parts: I had posted before that we were in the process of buying a 1982 Bestway Labelle. We just had the survey done. It will need some cosmetics, window replacements, they are somewhat clouded for our use etc. Otherwise it is a solid boat. However in the near future, it will need some cooling system issues dealt with: one heat exchanger, some metal hoses and the 4 inch exhaust hose. In looking for parts, I found that they did not seem available, at least where I was looking, any advice? are there other volva pentas that have interchangeable parts..