I don't. I have this link that lists a bunch of providers and their prices and I don't see anyone going over $100 per 3ml cartridge: https://www.goodrx.com/humalog?dosage=3ml-of-100-units-ml&fo...

Of course, there might be a more expensive provider that I don't know of.

I don't think that those people are making up reasons to go on 5 hour drives, but I do think it's quite likely that journalists fudged the numbers or just found some theoretical maximums and approximated the price from there. Just so it's a juicier story, of course.