Attached is the .pit file containing the partition mapping for the Epic 4g Touch. I extracted it using Heimdall. Interestingly, Heimdall on OS X Lion works with the Epic 4g Tough out of the box, which was not the case with the OG Epic 4g, which still doesn't have the updated sbl.bin to work with heimdall on a Mac.
Use at your own risk, I am not responsible if you brick your new toy, blah blah blah, etc etc etc.
Use at your own risk, I am not responsible if you brick your new toy, blah blah blah, etc etc etc.