Metal-frame cot with busted fabric (Ann Arbor Northwest Side)

Seeking a metal frame folding cot that has good condition and intact metal frame, but busted fabric portion (or intact but 100% cotton canvas). We hope to remove and replace the fabric portion, so we don't want cots with synthetic fabric (nylon, polyester blend, etc.) that would be in good enough shape for someone else to use as a cot! Thank you for your consideration.