Buying Resin for a Serving Tray Project?

I am trying to make a serving tray with 3 dimensional items placed on the bottom. I want to fully cover them with resin and have it harden so I can use it as a serving surface. I have looked at the big craft stores and can't seem to find a large enough bottle or the right kind. I have heard of a specific kind: Diamond Resin is really good, but I can't find it anywhere. Any ideas?

By My Personal Accent Blog