https://stash.reaper.fm/v/35900/Tape_Sim.txt
I think it's quite nice. It was added April 2019 to the Stash and I found it while searching for something else. I'm a little surprised that it just appeared there and no one's talking about it.
It seems as though it's the same saturation as in LOSER's saturation JS plugin, with some automatic compression as the gain is increased, plus a DC offset ("head bump") and noise generator.