I have an idea, but this would cost a fair bit. the idea is to study two pancreases (or three), one is a health fully operational one, two would be type 1 pancreas and study on why the body is rejecting it and not making insulin. i can do a study on why the pancreas wont produce insulin and why the body is rejecting it. how ever i do have some theory's
Theory 1: incomparable blood type mother and father
this one is self explanatory, example your body has your fathers organs except the pancreas, and you get the pancreas from your mother's blood type which makes the body attack its own pancreas
Theory 2: genetic mutation
this theory is also self explanatory
A costly solution:
this idea is costly but may work, not tested yet, scientists would get a sample of your DNA and clone you, transferring the pancreas from your clone to you. how could this work? think of 2 exact same cars, one starts, the other doesn't,why, because of a slip up, so cloning you could be the best option if this idea is ever tried out in the future