Bed frames are cheap...just go buy one and consider it a lesson learned. If your mattress has a warrantee, be careful to read it to make sure you buy a frame that supports the bed in the manner prescribed to keep your warrantee valid (some will require center support frames, some will require slatted boards with center support, etcetera). Read EVERY WORD and don't skimp on a cheapo frame or you'll have a bed that sags in the middle no matter how good the mattress was to start with.