I found a picture of a cupcake that is covered in fondant but also has a beautiful design imprinted on it. Does anyone know where I can get the tool to imprint these designs on the fondant. Please help.

First of all, Welcome!!
I'm not sure what they used to get that exact imprint, but you can use rubber stamps on fondant to make nice impressions.

You can find some wonderful impression mats at www.globalsugarartsa.com

HTH's

Have a wonderful day!

Christi