You're right. The model you have provided is showing up as a bagger: searspartsdirect.com/model/37r8i9tqil-000247/craftsman-917249392-grass-catcher-attachment-parts
Where are you reading this model number?
Common model number plate locations:
Frame (beneath the seat, footrest)
Underside of the seat
Back of mower/rear bumper
Lower side of hood, near engine
Enter your full model number on www.SearsPartsDirect.com
for parts. If you need a repair at your home, call Sears Home Services at 1-800-4-MY-HOME.
Hope this helps!