Need solutions to raise a large heavy pot off the ground.

I have a large heavy rectangular terracotta pot 900mm x 330 mm that I need to raise a bit off a concrete patio so that it is not lying flat on the patio. Needs to allow space under it for rainwater to flow freely. Any suggestions on what I could get to do the job and where I could get it. Needs to be weatherproof. Bunnings weren’t helpful.