Evidently your friendly local auto parts stores don't carry much vac stuff anymore. You can get packets of multiple size parts, but you cant buy individual pieces. Plus, they carry only three sizes of vacuum hose. And they didn't carry reducers. By the time I had bought the various pieces needed, I would have spent over $10. But I couldn't buy what I needed. I was pretty disgusted.

So I went to the dealer and bought the whole hose assembly. $20. Oh well, at least it looks original!