I recently had new kitchen installed and the sink has a tear in it, the company have agreed to replace and pay for the new install of the sink, the thing is I want a better sink but cant find any that are same size and better quality, my sink dimensions are 950mm/550mm, some sinks that I like are 1000/500 or similar, how much work would this involve I e cutting worktop, and units and is it something that can be done.