Unhappy Please Help...!!!

Actually im new in this field.I have been trying to update my s duos to jb for over a month now.I know there is no official update for this device from samsung. But i was willing to ask if there could be anything which you can do for this poor device now because Samsung has already made a new device with 4.2.2 and only custom roms available for this device. I have tried everything to update this device. I wish if you try to update to jellybean however but by modifying stock rom to jellybean. I request to please try something for this device it will be much appreciated.
Thank you...!!!