http://www.keurslager.nl/frontpage.phpAs far as I can see, every shopping precinct in Noord Holland has one of these. I've used different ones, and (maybe I've been lucky, but) every one has been helpful. By helpful, I mean they will go into their storage rooms and pull out the exact joint of beef/lamb/etc that you ask for and are happy to cut it for you, even if it's not a typically 'dutch' cut.
They all order turkeys for you; our order went in last weekend, ready for 23rd December pickup. We didn't know the size to order (we have a smaller oven than last year) so the manager went and pulled a couple of birds out of refridgerated storage for us to compare sizes.
Moral of the story - don't be afraid to ask for something you don't see on display, most are happy to accomodate you and if they can't, nothing ventured nothing gained