After multiple Snark tuner stems broke I just decided to print my own. These work great but may be a bit looser than your liking. I would try the size first but if you want it tighter, printing at 101% or even 102% should still work.

I just printed PLA a 0.1 layer height and 100% fill. They work great.
I would suggest using the short "strongest" one unless you use a stronger filament or are ok replacing it once in a while.

If you have a part of an old stem still inside, I drilled a small hole and then used a metal rod to pop it out.

Anycubic

All-metal Mega

No

Yes

0.1

100%