Just got a 'new to me' metro 21" mower. Cuts great and bags great! My dealer was telling me about a clip that is used to hold the bag on the bar so that the bag itself is straight in between the handles instead of kinda hanging off to the left side. Does exmark make some kind of clip like this? If so, could I get the part # ? Also, what is the part # for the blade that comes on the metro 21"ers? If I understand correctly, there is only one type of blade that exmark makes for these mowers. Thanks!