They don't want memos, but solid 10-15 year contracts. And since they are not getting that, not much is happening.
There's no need to be hyperbolic.
They're certainly facing a serious situation. But by all accounts they still have some runway. And if you'll check your current news feeds very carefully: no, the front hasn't collapsed, and no, the Russians aren't on the verge of overrunning Kharkiv and Odesa.
So no, Ukraine is not "out of ammunition NOW".
So if there would be a startup saying, we can build a automated factory, spitting out cheap javelin alike warheads using off the shelf components, would surely get money, if they have some expertise.