Located between the entrances of Disneyland and Disney's California Adventure in California is Disney's Walk of Magical Memories.
Dustie's personalized brick can be found in Section C76, brick number 212.
Below is a map to the Magical Walk of Memories. Section C76 is highlighted in yellow. The top of the map is the entrance to Disneyland and the bottom is California Adventure.
If you are ever at the Disneyland Resort please stop by and see the brick.
It is outside of the parks, so no tickets are needed.