We sell genuine Rectus 21 and 26 connectors. We have optional Stainless Steel or Nickel plated brass male hosetails.
As has been mentioned before, when you need to change either the male or female side of the connection, it's good practise to change them as a "set" so that an older connection doesn't prematurely wear the new one causing it to leak, so it's a little cheaper to buy them together.
Paul