http://www.worktops.uk.com carry a large range of worktops from a lot
of suppliers. They also have links to all the suppliers websites so you
can order samples.

Duropal worktops come in a 670mm wide version
Axiom worktops come in a 665mm wide version
Prima worktops come in a 665mm wide version
Omega worktops come in a 665mm wide version
Resopal worktops come in a 665mm wide version
Radius worktops come in a 670mm wide version

All of these manufacturers are carried by the above website. I can't
give any idea about their price compared to others though I'm afraid,
but maybe find a worktop you like from the list above then contact the
manufacturers for a local supplier (the manufacturers websites are all
linked from the above site).
Lastly, all the ones quoted above are for laminate worktops.
Hope this helps

Seri