I’m glad I found this thread.  I had no idea about a shortage on vials.  I use Novolog vials for my insulin pump (Medtronic 780).  Extracting from the vial is simple, however last week when I requested a refill of Novolog, my pharmacy at first said it was out of stock. Then, when I called to discuss it, they told me my insurance no longer covers vials, only pen cartridges.  I found this preposterous.  So, now I don’t know what to believe.  
Guess, I’ll try to figure out how to extract the insulin from the pen cartridge.  I saw the description upthread. Thank you.