Stainless 510 threads common?

I usually use stainless mech mods and like the quality construction. Atom & Astro my favourite because of floating 510 & telescopic.

I've owned a vamo which had no floating 510 and it had a chromed brass 510. Poor fitting, wears and distorts easily when dropped a short distance.

Recently bought a Sigelei Legend v2 that has stainless 510 and floating pin(spring loaded). I really like it.

I know floating 510 is not common. Are there any other vw mods that have stainless 510? Especially vw box mod.