I was wondering if Cutler Hammer made a part to convert a main breaker load center (CH) style, to a main lug panel. If so, does anyone know the part number or can you refer me to a location where I could find it? Cutler Hammer's website is not too user friendly. Thanks

It will be easier to leave the main breaker, so you have wire lugs to connect to. If the main breaker connect tos lugs on the load side, then just remove the breaker.