Unfortunately, there is no color match option for most of the Ghost Tints, especially Fresh Blood as it's a very unique shade of clear red.
The only things that I have seen that come anywhere close are Tamiya Clear Red, which while usually easy to get ahold of is very thick and needs a lot of thinning to be airbrush usable.
The second, is ForgeWorlds Clear red, I believe it's called Angron Red. This is airbrush ready, but it's a ForgeWorld exclusive paint which means ordering in bulk can get expensive.
With that said, in my personal opinion, if you've already started with Fresh Blood, do what you can to stick with it. Changing a color like that is going to result in two very different looks in your army.
Keep watching Amazon for the color and you can find it fairly easy.
Example:
https://www.amazon.com/Badger-Air-Brush-Company-Minitaire-Airbrush/dp/B009XP9DH4