[Test-Equipment] Parts specs

[Glenn Little WB4UIV]

Where can I find specs on a Sprague 672D series capacitor?
This is to replace suspect capacitors in a Tektronix scope.
I would like to find a suitable substitute.
I know that there are people selling the exact replacement part, however, I 
suspect that their parts are just as old as the ones that I suspect.

Any help appreciated.
The ESR on this part appears ok, the capacitance appears a little high, the 
leakage is high and goes up over time rather than down. If I overvoltage 
the capacitor by 50% the leakage appears more normal after I return the 
capacitor to normal working voltage for testing.

Thanks
73
Glenn
WB4UIV