On May 30, 8:24 pm, "Charles" wrote:
"C & E" wrote in . ..

All too often even when the parts are available they are so expensive that
there's little difference between their cost and the price of a new unit,
in relative terms at the very least.

Thanks. I forgot to mention that. I am so adamant about this issue that I
often buy the parts anyway just to keep the stuff out of the landfill and to
feed my ego. I feel good when I restore something to service.

If you feel that strongly about, take them to a local machinist and he
can make you new ones -- for a price, of course...

Or, more realistically, if you can find a machine shop that does work
for laboratories or similar small machine stuff they may have other
sources of supply...