K-5 Focussing Screen Shims - source in UK?

I've just installed a Katzeye focussing screen in my K-5, which has revealed a front focussing problem.

My understanding is that to fix the front focussing, I need to replace the shim that was factory fitted with a thinner one.

Where do I get hold of K-5 focussing screen shims in the UK?

Answered my own question - 01782 753330

Apologies for an unnecessary post.

Not sure but I've heard of people using paper as temporary solutions. Once you find the correct thickness required you could probably have it laser cut for you in a local metal shop.

My focusingscreen.com S-Type screen came with a couple shims and a couple tools. What does the Katzeye come with?

Edit: so who's that phone number ?

Katzeye did not supply any shims with my screen.

The phone number is Pentax Service Europe, who charged me £26 for a complete set of shims (which they call "washers") delivered to my UK address.