Quality Quidditch Supplies is the name of a shop that is featured on the north side of the Diagon Alley section of Pottermore.
From the Story[]
"Quality Quidditch Supplies is a shop in Diagon Alley, which stocks racing brooms and the Quidditch robes of popular teams."
Locked[]
As of March 2015, Quality Quidditch Supplies is locked, and it is not known when it will become available to enter.