Somebody knows where to get aluminium covers for the bigger knobs of Pioneer gear from 1972 ( TX-1000, SA-800, SA-1000, QL-600 .....) Tuning, Volume Selector ..
If you ever find some place to get them, I'd be VERY interested as well. My SA-800 lacks all but two of those caps (and the power knob - if you find any of those, just tell me