There is quite a few insulin's on the open market today that are not made from porcine (pig) and bovine (cow). But porcine, and bovine insulin is still available, there is immediately a human insulin which is a chemical synthesis of the insulin protein and works very ably.
I am not sure that a Muslim person would know how to use a porcine insulin, but as I said that there are heaps other insulin choices available.
It has be quite some time since insulin have been extracted from animals. Today, drug companies use a synthesized interpretation of insulin.