We’re beginning to prepare for worlds. In my previous years getting ready for worlds in order to emulate a raised field we sat on our knees. We recently became able to buy some risers but I have no idea where one would purchase them. Any help?

Many teams make them

I’d start with a company that specializes in theatrical supplies, like this one or this one. Here at Robot Mesh, we have one that was built by a local team out of 2x3 lumber and OSB. It cost about $150, but it does not fold up like a factory-made stage would.