NOS MK2 P.S. pump ---seals?

I’m about to replace a MK2 power steering pump with an N.O.S. pump that hasn’t seen the light of day for 50+ years. Aside from filling it up and set aside for a few days to let the old seals get comfortable before installing it , i’d like to find out if there is a new re-build kit out there that some one had good luck with. I figure I have a 50-50 chance of a leak. At least it’s a snap to remove and all the parts are old, but brand new.

Thanks,
Phil.

You could fill it with DOT 4 brake fluid which has a tendency to soften and swell seals. Might put new life into them if they have been dry for a long period.