Need a spring loaded 510 center pin assembly? Here you go...

[Ms. Trixy]

Need a spring loaded brass center pin 510 assembly? 22mm, here's where you can find it:
DxVape - $1.05

 

[PoppaVic]

 

[Ms. Trixy]

Nice! I guess I didn't strike gold after all. Those are nice!
I just happen to stumble upon this one while looking at accessories at the vendor.