Update:

Went to the local-yokel auto parts in BFB Texas and they just shook their head and one even laughed at me when I showed them the after market booster so I called an online dealer and ordered a new 7" double diaphram booster just like the one I have.

They promised to have it here by Friday but that remains to be seen. More info on the Friday evening news.

Their site sure had a good booster trouble shootin' page that I may post here later.