source for Service bulletins? assembly diagrams for service?

I am looking for old Piper Cherokee 140 service bulletins that are no longer available for download from Piper.
I am a student at a part 147 AMT school, and the school doesn't have a subscription for whatever reason...
Today, I am specifically looking for SBs specific to assembly&rigging / control cables
I have the relevant ADs, but the Service Bulletins have much more detail and diagrams.

I also notice that the IPC often references assembly diagrams. These would also be very handy, as the diagrams in the old paper service manuals are usually hard to read. Anyone know where I can get those?
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