lwelve - We currently offer a soft sided catcher that mounts to the side of the deck (model # 30104). It is likely that a new collection system for the GrandStand will be developed sometime in the future, but we can't commit to the style or timing. You might also check AcceleratorIndustries.com. They make a 4.15 cu/ft and 6.2 cu/ft catcher to fit the GrandStand 48" and 52" decks. We can't speak to the performance, but many Lawnsite members have had positive experiences with their systems.
-The Toro Company