Dragon's late model Brummbar

Has anyone built this kit lately ( kit # 6026)? I just finished the main hull assembly when I realized I 'm missing part of the commander’s cupola. NO, not a piece , but the part that is according to my directions is supposed to be molded into the top hull/fighting compartment that includes the periscopes. There’s just a nicely cast hole where the cupola is supposed to be. It looks like they gave me the wrong upper hull, but it was attached to the right sprue , all the parts matched up.The kit was brand new and factory sealed. Is there an aftermarket one available and if so, who makes it? Should I try contacting dragon? Any help greatly appreciated.

Try contacting DragonCare. I’ve never had any problem with them.