Is It Possible to Get a Fat Transfer from Another Patient?

Can my friend be my fat donor ? - only if your friend is also your identical twin. If not the process of immunologic rejection would cause all the fat to die, along with a host of other potential complications that would occur.

To answer your question, using fat from another patient would simply not work unless you have an identical twin.  When you remove fat from your body the fat consists of live cells, and if they are injected into a different person, their immune system would attack the cells, possibly causing a dangerous reaction.  I would see another board certified surgeon for a second opinion to see if maybe there are some areas in which he can liposuction some fat.

For the fat transfer procedure you need to use only your own body fat. It is not possible to harvest fat from another patient and successfully inject to your body. Based on the pictures provided by you, you still could be a good candidate for the liposuction from the abdomen area. I would definitely recommend to see an experienced plastic surgeon to determine what exactly could be done in your case.