You can use part number GCHP or GCHPXL. List is 359.00 for the regular size unit or 499.00 for the Jumbo. Your dealer will have to have this shipped in from our factory (via Outdoor Equipment Distributors) as this is a somewhat uncommon unit. As far as the Meg Mo Blades, I would think they would work well as the discharge force with these blades is excellent, according to the posts here on lawnsite. If you have any questions give me a call at the office.