I have the original Pen from Novo Nordisk and had a great source for original nord cartridges BUT alas he is no more and now im stuck because of all the fake shit that doesn't fit in the pen.

Does anybody know where I can obtain the genuine article as I have tried a few sources and they are all either selling fakes or claim they do not know if their cartridges will fit or not which in my mind means they obviously will not.