Tee- and end-connectors

Dear all,

I am a product designer with little experience in piping and was wondering whether you have an idea about where to source next parts?

1) I am looking for a hose end connector with a “grey” metallic look to connect a garden hose to a standard tap without having to twist the hose.
But so far I only found plastic ones like:
www.tefenplastic.com/technical.php?pid=882 plus a reducer, but maybe there are better solutions like a single piece?

Thank you in advance,
Wouter

No answers?
Maybe end connectors in grey/black plastic (not necessarily metallic) are easier to find for insiders?
I only found this one on Google Images and I can't find the manufacturer/vender;