Mark Shefrin wrote:

I've got a trusty old Medai/CyclePro floor pump that is losing
compression. I've greased the washer over the years but it feels like
time for a replacement. My LBS's don't have anything close in size.
Any sources? Or instructions on making the cup shaped washers?

We have 'em

http://www.yellowjersey.org/pumpbits.html

As will most competent LBS. That model was sold under
dozens of brand names for 30 years.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971