DIY W/C parts in the UK?

Where can I buy all the little plumbing bits that watercooling requires, like brass hose barbs/hose tails, something along the lines of these. But brass ones. And also T's and Y's and all other such little bits? I haven't been able to find anywhere online that does then, and since I've not been in the UK for that long I'm not sure what DIY store might carry them either.

I'm looking for a DIY online store preferably, as watercooling specialist stores tend to charge outrageous prices for even the simplest things. But anywhere that carries all the bits you need at reasonable prices will make me a very happy man.

Apreciate any help here guys.

www.over-clock.com - best UK watercooling website bar none

http://www.componentsuk.co.uk has some good stuff

http://www.coolercases.co.uk/ these guys got all u need and then some.
Not sure about prices tho. might worth to check out at least

Awesome guys, thanks!

http://www.valvesandfittings.co.uk/

Everything you could ever need in whatever material you want.

rdm