Here I go with truck parts again! Ok, if you know someone or go to a local truck stop, TA's and Petro's work best but any large facility will work. Maybe a company or small truck stop.
Now, you know the washers that go on the top of stud style shocks? Or the washer that goes on the sides of the bottoms? You know the part that kind of squeezes the rubber a bit. Those can be had free and do the job! When they take off old shocks, away they go! Trash! They may have some on hand, they may save some for you next time they sell some shocks. Get a bunch, give em away.
I brought in a coffee can and put Used Shock Washers on the top, Told mechanics what to do and come back a few weeks and empty it out.
What is cool about used ones is that they are rusted just enough to make PR15 Really stick to em. Or any Rust Converter will work. Then spray the side that goes towards the plate, install and then spray side that is down. This will also kind of "Seal" the threads from water and corrosion and they will come off even that much easier.
Some types work better than others, but they are the right size and super heavy duty! And, free! MC