Since there are so many and different models involved, I'll just post them all when I get home tonight.
I get the TSBs from AllData at
www.alldatadiy.com. They have online repair manuals along with recall and technical service bulletins. It's what my friend's auto shop uses for all of the cars they service. For home users, they charge $24.95/year for the first car and $14.95/year for additional ones. I have the FSMs for the 928, and the pictures and illustrations are the same on the AllData website and in the FSMs so they're pretty close to the original manuals but nowhere near the $600 price of the Boxster FSMs. The instructions are better in the FSMs, though.
One thing though, if you look at getting a subscription for all of your cars and you have Hondas, they don't have anything available for them. Honda will not release their info for use by the consumer, just professional shops.