A while back I ran across this dude's videos where he discusses these kits that can help reduce the fan noise from miners:

At the time, I didn't need these solutions, so I just bookmarked these videos for when I did need them.

Now I need them. But none of these products are available anymore.

I'm hoping someone here can suggest an alternative. I just need a way to reduce the noise from my S19j Pro from the current 70 decibels, down to 35-ish or less.