You can buy a Blackhawk Stomp kit for about 375 bucks.
The ones I see on the internet for $300 are for the container only, they are not loaded out with supplies.
One can put together a kit, but one needs to know wth they are doing in that regard. For instance what kind of suturing materials, what kind of necessary supplies can one obtain without a prescription, what kind of things can one obtain from nurse and doctor friends, antibiotics, anesthesia, etc.
Often thought I would tell my doctor I was going into the backcountry up in Alaska on a scientific mission for several months and needed some emergency “stuff” to see what he would recommend and perhaps provide (he would know I was BSing him but wouldn’t say anything).
Gotta’ hit the sack, good night!