first aid

So the first aid kit in my '01 Xterra is long gone. One of the previous owners must have removed it. I had an idea to replace it with either another first aid kit or an ever-day-carry bag. Anyone else done this? What bag did you use and what did you include in yours?

What is everyone using for FAK's? I lost the xterra one years ago but keep my CLS (combat life saver) bag with some added stuffs in it. The only stuff I don't have (anymore) are the saline bags. Where can I get those? (Don't have any corpsmen buddies anymore) Can i just buy them from a medical...