these cabinets are stock sizes put together as custom. they were done by a cabinet supply co. rather than off the shelf at home depot or something. depending on configuration, sometimes a cabinetmaker can be cheaper. i have had that happen with odd sizes. if standard sizes that can be put together (say 30" piece + 18" piece = 48" total size) a cabinet supplier (usually thru a builder or contractor) can do what you need at a good price. hope that helps!