Check out if there is a local clinic that you could use. You may still need to buy the insulin out of pocket, till you can get in. Thats what I did. I bought mine at Walmart, and it was $138. Once I got into the clinic I was given some free samples and also references to local charities that were able to help me out till I got package from Patient Assistant Program. The Patient Assistant Program takes about 4-6 weeks. They can also help you out with supplies.
The clinic I use charges on a sliding scale. I pay $15 for the doctor appointment, but I have to pay extra (a nominal charge) for all tests.
I hope you can find a clinc, it sure is scary to think of running out of insulin.