I put my money where my mouth was and bought one of these. I haven’t installed it yet but it is very nicely made in the USA and comes with a gallon of desiccant.
https://www.zoro.com/arrow-pneumatics-desiccant-dryer-1-gal-d12-04xxl/i/G2789479/?recommended=true
The box it was shipped in made me thinking it was gigantic.