I'm putting this in the Dolomite section as it has greater potential audience than just 'ebay items'.
I've just bought a couple of these based on the illustrative picture showing something more like the original rubber/plastic type water seals:
http://www.ebay.co.uk/itm/291241386271? ... EBIDX%3AIT
They arrived and test fitting into a brass cage shows indeed, far more faithful to the original seal; no more pressing a metal water seal into the cage. Far more satisfactory in my opinion and no issues for the future when trying to unpress the metal seal from a brass cage!
I am in no way connected to the auction/sale, except for having bought two...which arrived separately as they only sent one in the first package!