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.
Good luck!
Miles thanks for the lead. I used to do a lot with Bearings Inc.
I found this SKF seal finder and it is great.