That’s what openinsulin.org aims to solve.
In the mean time, I heard that there are actually insulin in most phamacies such as walmart that are $25 a vial. No prescription needed and no insurance needed (you need to ask a pharmacist tho). They are supposedly less effective and less reliable? But can still keep you alive at least.
This is not medical advice and I’m not a doctor.
Edit: Snopes Fact Check says “Mostly True”: https://www.snopes.com/fact-check/insulin-walmart-vial/
Yes, but extremely physically irritating and “watered down” per family, making even basic control very challenging, and pain inducing.
Truth is, none of the formulae for insulin have changed much since the 80s when recombinant insulin came into the market. Nonetheless, price had increased by ~2000% (not a typo) since initial introduction in the mid 80s.