I used the parts list and came up with the part numbers for the Power Brake seals. Thanks Chris D.
I have found all the seals except the National 50695 or National 450695.
It has a 1.983 OD and a 1.188 ID.
Anybody have a source? I tried George at Olcar and his VM is full. I hope things are ok there.
Applied Industrial Technologies (formerly Bearings, Inc) will have any seal you need, or try your local NAPA dealer and look in their Chicago Rawhide catalog.