I'm from spain sow don't have much resources wich UK company sell these..??

Hope you all can help..
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If you're on about converters, then Think Auto is probably a good place to start, or www.rswww.com

a lot of company's sell them incl.
GTS,

take a look at
http://www.rallydesign.co.uk/catalog/default.php

which bits are you after? the actual screw in connector with the pipe sticking out vertical to allow you to connect a remote resevoir?

if so, ill get some made for you and send them out to you. they are only M12 connectors with a bit of pipe on the end.