I bought the Wal-mart brand "My-Life-As" Snack-Stand ($27.97). Disclaimer: the Wal-mart on-line photo isn't the same as what's in the store. It now has chocolate chip cookies, chocolate cupcakes, a lavender/white canopy and a lavender cash register.
I painted the canopy stripes black and printed off a front view of Grace's Patisserie which I glued on (and then covered with laminate).
I also added in treats from the Target brand Our Generation Tea Set ($16.99), along with treats from various swaps on AGPlaythings. -- YUMMY!!
The finishing touches are the tiny bags and boxes printed off and assembled using this idea/template from AmericanGirlIdeas.com blog (free).
UPDATE: I made a small platform with wheels out of things I found after dismantling some extra "Build-and-Grow with Lowes" stuff this afternoon. And spray painted red to contrast the cart.
Still looking for the white cabinet handle that I know is around here somewhere. I plan on gluing that to the end of the Cart where Grace's hands currently are, so she can push it around.
Didn't find the handle, so ordered one from Lowe's.com (direct link to the handle I ordered) and super-glued it to the cart.
Completed Petite Patisserie!