Donations/cheap supplies for teaching Stop the Bleed for vulnerable populations?

Hello folks, I'm going to be teaching a few Stop the Bleed courses coming up for vulnerable populations in the Miami/Broward areas, and I received way more interest than I expected! That being said, I am running the courses all myself, providing all the equipment and the like, and...stuff starts getting expensive to purchase and replace pretty quick. Any suggestions on where to possibly find cheaper supplies or possible supply donors? Thank you so much!