Costco Foam Mattress Where Can I Get A Cheap Memory Foam Mattress Foundation ONLY Queen?

Where can I get a cheap memory foam mattress foundation ONLY Queen? - costco foam mattress

I bought a memory foam mattress at Costco, it comes with a foundation. I have an old queen box spring, however, the height of the mattress plus 4 "Topper, and 10 'bed, power header attractive that I bought. I bought the Bar Kit Ikea, but not my bed frame is only 3 bar for Ikea to rest more. Do Ya understand what I mean?