Recommendations please, need to reface kitchen cabinets/ relace cabinet doors?

Hi All,
I need to replace the doors on my kitchen cabinets while retaining the carcasses. Has anybody here had this done? I have had a look around and there are plenty of companies who will come in and do the whole job start to finish but I would rather keep the cost down as I can do the removal and fitting myself, ie- give my old doors to a manufacturer who can copy sizes and hinge locations, allowing me to collect and refit doors myself. FYI my current kitchen is an off-the-shelf job using all standard size carcasses and doors. Any suggestions gratefully accepted.