The star cutter I used is from a set of clay cutters made by the Makin's company. I am fairly certain I picked these up at Michael's years ago. The round cutters are made by the Kemper company. According to my ruler they are about 1/4" and 1/8" in diameter. These should be readily available in many places that sell clay.
For the base for my cake to sit on I used some of my card-making/ paper crafting supplies. I had the scrap of metallic cardstock in my scrap bin and it happened that the cake sit really nicely in the shape cut with the set of scalloped circle dies that I had in my drawer. These were used with my Big Kick die cutting machine.