If you know someone with HP Tuners, I'm pretty sure you can read your file and at least look at it without buying credits. Someone let me know if I'm wrong.
Your other option is a combo of programs. Visit:
https://pcmhacking.net/forums/viewforum.php?f=42 and read around this is where the free tuning is being discussed.
Found this video on the subject. There are others
https://www.youtube.com/watch?v=Y4TybWavYW4
I use PCM Hammer to clone my PCM using the OBDLink LX.