These are the ones that I carry:
1) http://www.liveactionsafety.com/military-elite-tactical-trauma-first-aid-backpack-full-kit/
2) https://www.narescue.com/law-enforcement-tems-products/casualty-response-kits/tactical-operator-response-kit-tork (you can build these yourself for much cheaper) I was given this kit. I would not pay $225.00 for it.
I always add items to my kits. The items I usually add are multiple CAT tourniquets (for the big kits), multiple compression bandages (for the big kits), chest seals, Quick Clot combat gauze, flashlights, headlamp (for the big kits), hand sanitizer and sanitizing wipes, steri strips (butterflies).
These are the items that I put in my small built kits (like #2)
1 x Nasopharyngeal Airway 28F with Lubricant
1 x HyFin Vent Chest Seal Twin Pack
1 x Needle Decompression Kit (14 G x 3.25 in.)
1 x CAT tourniquet
1 x 6" Compression bandage
2 x 4 yards rolled gauze
1 roll 3m Transpore medical tape
1 x pair Trauma Shears (7.25 in.)
1 x package Quick Clot Combat Gauze
1 x small LED flashlight
1 x zip lock bag with steri strips and fabric bandaids.
2 pair nitrile gloves
You can get basic first aid and CPR training online here https://nhcps.com/ they run deals on Groupon all of the time for their First Aid, CPR and AED training for around $20.
Quick Clot has free online training for their products here http://quikclot.com/QuikClot/Off-Nav/Static-Content/Training-Education