RockSolid Guest Bathroom Makeover:

I have a question about the rock Solid challenge, i have gone to both Mernards and Lowes to buy the Rock Solid Home kit and neither place here sells it. I looked online and found that Home Depot sells it however there is none near me and it sells there for $100. In the description of this challenge it says we can pick up the Home kit for roughly $50. Does anyone know if there is another place i can buy this that im missing/not finding? I thought id ask before i order it for $100 from Home Depot.