White Knight also have a laminate paint but any semi gloss or gloss enamel paint works just as well. The key to a good finish is the preparation; clean thoroughly to remove any grease/oil, fill any dents & areas where laminate is chipped, reglue any loose edge strips, sand, wipe clean with methylated spirits, apply an oil based undercoat, leave to dry overnight, lightly sand with very fine (black) sandpaper, apply 1st top coat, leave to dry for at least 24 hours, if necessary very lightly sand, apply final top coat then leave to cure for a few days before rehanging. Recommend painting backs & fronts, the best finish will be achieved by removing the doors, catches & handles. Use a low nap small roller. Alternatively, if you're quite experienced with a spray gun, you can paint more doors in one session as long as you have a clean dust free space to set them out. Below, 2 examples of painted laminate.

are they made of wood or mdf if so. they can be painted

It's not for everyone but I love black kitchens. http://thealabarenetwork.com/kitchen-with-black-appliances/kitchen-with-black-appliances-brilliant-with-cream-and-black-kitchen-design-ideas-remodels-amp-photos/

I agree with the previous comment. Find a local handyman with carpentry skills. He will source having the cabinet made to match. I have just organized our whole kitchen, you will find a 2 pac sprayer that can match your existing colour. There are many cabinet makers that will build the carcass, and a good handyman with carpentry skills can install.