I finally found an Oildyne distributor in
my general area, and ordered a Seal Kit for my hydraulic pump. Locate
a Distributor of Oildyne Division The kit is part number 634412
and the cost was $105.41. The kit supposedly contains all the seals
for the older and newer versions, but it looks like it doesn't
contain the rubber gasket for the old style metal reservoirs like
mine. I've attached a .pdf showing the contents of the kit.