Im putting one together for a friend.

Of course it needs to be set up for your specific needs,
Building your own will be better than a complete kit, by either cheaper, better quality stuff or less bulky.

Stuff for burns - Burnshield dressings and gel
Forceps
tweezers
Steristrips + Dermabond or Mastisol liquid for cuts
Compression bandage (Israeli Bandage)
CAT tourniquet - though elastic tubing or anything tight can serve in a pinch
Trauma shears
Gauze
saline bullets

According to needs -
Paracord
Ibuprofen, Acetaminophen, allergy stuff, diarrhea stuff
Bandaids
Sunblock
vaseline for blisters/lips/dry skin