How to convert file in SCORM 1.2 fomrat to SCORM 2004 format without sourcefiles?

Question

Our organization is in the process of migrating to new LMS which allows only SCORM 2004 format to be uploaded. But all our files are in SCORM 1.2 format in the old LMS. Some of the files are 2 to 3 years old that we are unable to track the actual source files. We have the SCORM 1.2 files downloaded from our old LMS. Is there a way to convert these files from SCORM 1.2 to SCORM 2004? Please advise.