You can find all the essential items, materials, and equipment for a complete first aid kit online at FirstAidSurvival.com - much better selection of options, better prices, etc.
I just put on a basic first aid class with a;HOW TO MEDICAL BAG, It cost about $800.00 to fill the bag. Top of the line, Trauma gear, Dental gear, Wound/Suturing gear, Medications to include Fish Antibiotics, Cell Salts, Tinctures, Colloidal Silver, 35% Food grade Peroxide, Simple Honey and White Sugar for wounds and Cayenne pepper and horn blood stop for bleeding wounds. This is just a start for training and building a medic bag, it comes with a 3 month course which I teach for free in the American ReDoubt, AO is Priest River ID. Best Regards, RangerRick