Craftsman 987.799601 5hp Chipper/Vac blower part

Hello all. I have this chipper/vac and cannot find the blower chute that attaches to the back of the deck to convert it to a blower. When checking Sears parts online, they say it is discontinued. Does anyone know where I can get one at this point in time? According to the manual, it is called the "deflector kit" and part # 1769637. Can't seem to find it anywhere.
Thanks, DSA