Where is the best place to find parts?

Mar 5, 2014
Fort Leonard wood, MO United States
I am trying to find a place where I can order parts for my 1984 blackmax 200. I called two dealers and they both told me it might be hard for them to order parts for such an old motor. My Internet search hasn't been much better either. I just want to get an impeller, thermostats, poppet, and maybe have an extra rectifier. I ordered my oil injection block off kit and wanted to knock out the normal maintenence while I was at it. Thanks for any info.