in answers to your question Derek, it's a five lug ( do I really have to upgrade if it's been working for all these years?) and Jim, I did call the local Toyota and although they "aren't sure" they think they have the outer and inner seals as well as brake pads. Not too many people looking for 79 replacement parts at this point...
Would anyone else like to weigh in on this?
We're going to have a mechanic friend take a looksie on Weds and see what he thinks - gotta find experts like you all who have the wisdom and experience of this issue -
Thanks in advance, Ciel