Supplier of decent H4 headlight socket?

[titusni]

I'm about to start wiring up a relay harness for my trike's headlights. "www.vehicle-wiring-products.co.uk" is the place I'd usually buy bits and bobs from. However their H4 headlight sockets look a bit cheap and nasty, also there selection of relays and in-line fuse holders isn't great either.

Anyone know of other online sites to buy such things - in particular decent H4 sockets? (i.e. splashproof)