Mike,
Adam at BCMA Engines had beening selling the Power Stroke engines. Any muffler that will fit a Homelite 25/30 will work. All you need to do is grind or file down the heads on a pair of bolts, so that the heads will fit into the cavity behind the slot. Slip a gasket and muffler over the bolts and install nylon lock nuts. A pair of 10x32 bolts worked for me. The muffler mount is the same a used on t the G62 (slotted). This is a very secure installation.

Dave