I have been working on our medical kit the last few day and have had great luck finding things I never thought I would be able to as a civilian. I was able to order I.V. fluids and the equiptment to administer it (do reaserch on how to start a line because there is a lot involved). I was able to get suturing supplies as well. Other things I have ordered are some basic and inexpensive birth supplies because I have someone close to me expecting but, I think every well rounded kit should have a basic birth kit in it! I have had 2 home births, studied midwifery and apprenticed with my own midwife for about 6 months so I can help anyone who would like to put together their own emergency birth kit.
inhishands.com (basic medical, sutures, I.V. lines and birth kits)
https://www.mountainside-healthcare.com (more advanced medical, I.V. fluids and supplies)