Ive got a few of these spare. Bought from a US homebrew shop so all are perfect & seal correctly. Anyone interested pm me.
(http://moreflavor-pavinthewaysoftw.netdna-ssl.com/product_image/morebeer/232x240/9108.jpg)
http://morebeer.com/products/female-stainless-steel-quick-disconnect-wbarb.html?site_id=9
Looking for 10e each. Cheers. (do not compare these to the QDs you can get in Ireland - they dont seal & are useless!)