I'm not sure what wine rack you are referring to in the display home, if it is the one they sit on top of their fake fridges, then I think they are just make shift ones, they don't actually fit into anything. I'm not sure it would be a good idea to have it sitting on top of your fridge.
If you look on my blog you will (just) see the one that I've put in. I got McDJ to put mine in so that it would match the rest of the kitchen, its fitted onto the wall. You could contact McDJ and ask them who did your kitchen, then you can contact them direct and get a quote. We have done this for a few things I need to change after handover, I'll also be using them to do some additional work that I need done in other areas of the house (cabinetry above my desk area). I doubt very much you would be able to get one from somewhere like Ikea they would need to be custom made to accommodate the style of your kitchen.