trunnion rebuild?

I have several early A cars I want to use the old trunnion shaft. 1 is froze solid. I've asked plenty of advise on how to free stuck engines. advise includes, coca cola, skunk pee ( its hard to get), etc. I was thinking of soaking in mixture of stf and acetone in a bucket?

also ac a rebuild kit be found that at least has the hard parts???? thanks