Welcome Jim and Hunter. I know getting that diabetes diagnosis is a bit of a shock, but you will find lots of information, answers and support here.
First, the Hills MD is not a good choice for a diabetic cat, it's actually too high in carbs, and it's also too expensive. Many members here feed Friskies pates and Fancy Feast Classics. You need to use a food that has 10% or less carb content. Check the food chart
HERE and filter through to see how different brands stack up. The vet who complied the chart, Dr. Lisa Pierson, has a wonderful cat nutrition site you might want to look at:
www.catinfo.org.
Second, home testing is the best tool you will have to keep Hunter safe from a hypo event and to see how diet changes and insulin is affecting his blood sugar. Please take a look at the FAQs forum for critically important Hypo information, creating the Hypo toolbox, and go through the Index for information about feline diabetes treatment.
HERE
**A diet change is going to lower his BG (blood glucose level) so you need to be home testing to ensure that the addition of insulin is not going to send him into hypoglycemia, or to tell you if the dosage needs to be changed. We all learned to test at home and it has saved many of our fur friends from what might have been disastrous consequences. We can help with learning how to do that.
Many members do get Lantus, Levemir or Basaglar from Marks Marine and have recommended that option. You can post this question in the Main Health forum and get response from those members. Here is a link to some information:
http://www.felinediabetes.com/FDMB/threads/buying-insulin-from-canada.203498/
Please create your signature, so that Hunter's pertinent info is available to members responding to your questions and concerns:
SIGNATURE This information can be edited/updated as you go forward.
Looking forward to following your progress and hopefully seeing a picture of Hunter!