Why use Porcine when you could get human.
The Clinical Islet Transplantation (CIT) Consortium National Diabetes Information Clearinghouse The Chicago Project
And your numbers need updating,
According to the U.S. Department of Health and Human Services, the American Diabetes Association and the Juvenile Diabetes Research Foundation International, 20.8 million people in the US (7% of the population) have diabetes.
Total: 20.8 million children and adults -- 7.0% of the population -- have diabetes.
Diagnosed: 14.6 million people
Undiagnosed: 6.2 million people
Pre-diabetes: 54 million people
1.5 million new cases of diabetes were diagnosed in people aged 20 years or older in 2005.
Type 1 diabetes accounts for 5% to 10% of all diagnosed cases of diabetes. Risk factors for type 1 diabetes may be autoimmune, genetic, or environmental. There is no known way to prevent type 1 diabetes. Several clinical trials of methods of the prevention of type 1 diabetes are currently in progress or are being planned.