diy-kitchens.com if you're happy designing it yourself.
Or get someone round from one of the sheds design/quote and then recreate the layout with diy-kitchens.
Also that scope of work will most likely involve a variety of trades so estimating a price isn't really doable.
Kitchens.
What's the view:
ikea = good, best at the price?
How much for rip everything out, put new cupboards in, possibly move boiler, build some bench seating?