Precision Audio Supply capacitor;4.0Ufd

Any one familiar with these capacitors? These were built for an X-MIT employee and were made in the late 80s-early 90s.They are bright yellow and the size of a D-cell battery.I understand that Atmosphere uses the smaller values in their amplifiers.Alas,Ralph didn't have any of the larger values.
Thanks for all replies in advance and a Happy New Year to all.Tom
I am assuming that these capacitors are long-gone,due to no responses.I knew that the gentleman who had spec'd them and had them built died.A real loss,as they were great capacitors.He will be missed.