Well If you really, really, really want one, I could possibly be persuaded to sell you the one in the image
I still have it somewhere. I thread tapped it and fitted 1/2" barbs to it, can't remember if I sealed the barbs in with aradite or not now I'd have to find it but I have a meeting at the bank tomorrow so I'm pretty busy doing accounts until then. It is unused other than testing, was destined for my shuttle w/c project but I can get another.
Read my article about it through to be sure you want one, and then let me know...