As Grenades can be crafted via F9 it wouldn't be a bad idea to add the other throwable weapons like Satchel, Tear Gas and Molotow Cocktail as craftable items as an alternative way to buy it in Ammu-Nation. It would also creates another demand for Electronics, Chemicals and the rarely used Gold.
Proposed ressource consumption when being crafted in F9:
https://imgur.com/i99dDYYBecause of the high single projectile cost of those throwable weapons I suggest crafting it should be only from +48% up to +50% more expensive in comparison to buying the same projectiles in Ammu-Nation.