I do not know if the original poster or that SR5 are available.
However, I am offering an alternator from an SR5 wagon, with a built-in regulator: viewtopic.php?f=3&t=15308
I also have a power steering rack but I believe it needs new seals, which is why I did not post it here. It is from a 1985 SR5 with <52,000 miles but was in storage for several years, which may have allowed the seals to dry out.
In the New and Used parts area of this forum, I have numerous other 1985 SR5 wagon parts available.