I know the one for the D2 is listed as a separate part number - check your parts catalog to see if it is for your D7 serial # then try Cat, machinerytrader, and Florin. Mine is dented and comes out but I'm in no hurry to deal with it as the cap can be fitted / removed and it doesn't otherwise give problems. I haven't run it under rated power though, or for any appreciable length of time so it might become an issue for me.