ZINUS SmartBase Compack Mattress Foundation, 14 Inch Metal Bed Frame, No Box Spring Needed, Sturdy Steel Slat Support, King

Just an FYI with your mattress on the floor you run the chance of mold growth. If this is short term while you're waiting to buy a smart base then it might not be a problem. Otherwise you can put some pallets under the mattress to allow air flow. There is a Smart Base currently on sale for Prime day. https://www.amazon.com/Assemble-SmartBase-Mattress-Foundation-Replacement/dp/B00R6OXL0E/