littlebabyjesus
one of Maxwell's demons
The options available to a type 1 diabetic are: a) you use the insulin the NHS gives you or b) you die.Perhaps you mean that I haven't answered the question in the way you would like it answered. I believe that my reply also applies at a society-level collective effort, probably even more so. In my opinion to make the best use of finite and limited resources we'll get the biggest bang per buck by focusing in prevention strategies.
I would explore all the options available, however even in your supposed real life scenario, killing animals was not necessary.
"Until 1936 diabetics were dependent on animal insulin, but it is important to establish that they were dependent on an animal product (which was obtained from the meat industry) as opposed to animal experimentation. In 1936 synthetic insulin was developed.
This history of diabetes and insulin is verified to reliable medical and historical texts, and shows that diabetics owe nothing to animal experimenters. The claim that they do does persist, and we would encourage anyone interested to look into this further."
Source
Take your time exploring those options.