Type I?
You want to see a NZ company here called Living Cell Technologies.
They take porcine beta islet cells, encase in a biopolymer capsule, and insert in your periosteum lining .... bingo.
No more type I.
The pigs were left on an island by 'Captian Cook' and have inbred enough that they are useful.
Type II is more problematic, but gastric by-pass is a cure. Of sorts. For some reason, shorting out a part of the intestine works ....
And all those here talking hypertensive medication- there is renal denervation experiments underway that cuts the afferent arrtery to the kidney - it works - expect 45-50 drop in blood pressure. No more chemo type meds.
Stay tuned!