Tiny Start Craftables adds crafting recipes to Tiny Start's Tiny Armor Mk0, as well as a crafting recipe to turn the Mk2 variant of Tiny Armor into modular armor. By default, the recipe for the upgrade from Tiny Armor Mk2 to Modular Armor is available from the start and craftable without access to plastics or advanced circuits, however it can be toggled to require research (past modular armor) in the mod settings. The recipe should be more expensive in other resources compared to the default modular armor recipe. Suggestions for recipes and/or costs of existing recipes are welcome.

Big thanks to Noxy and his waterfill mod, as I studied it to learn startup settings for tech requirements. Check that mod out below, and maybe give his other mods a look:
https://mods.factorio.com/mod/Noxys_Waterfill

This mod requires the TinyStart mod by Yehn:
https://mods.factorio.com/mod/TinyStart