help with CF card on Catalyst 6500 with Sup720

Hi, can anyone provide a dd-image from a CF card from a Catalyst 6500 with Sup720, please. We have a refurbished 6500 w/ Sup720-3BXL with an old rommon which is not able to format a CF card. (various other methods with formatting FAT16 on Linux etc. did not work; google search only pointed to format within a running system, but we do not have such a system nearby) IOS image is already present. any help appreciated. thanks, martin