Ayuh,..... That choice is up to you,....
I built my own, outa 1/2"- 13 X 1/2" ssteel bolts, ssteel flat washers, 'n an o-ring as a seal,....
I believe one of the after-marketers makes copies of such, as that's where I got the idea,.....
'n no, I don't remember who,....
Btw,... They are...