If there was a way to make it myself, or if there were a substitute that worked even half as well, I'd switch over to it today.
For me, I've just had to accept the fact that when the SHTF I'm more than likely going to be one in one of the first waves of casualties (easily within the first 60-90 days.)
That's just the fact of the matter. It is what it is. My concern beyond that is making sure my wife and son's have what they need to survive without me.
Sorry about the inevitability you must face. :-(