Head on over to our FluxCP repo as we have our own for Hercules.
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The best bet for you is to go through our commit history (https://github.com/H.../commits/master) and manually add the changes (that are needed to make your FluxCP compatible with Hercules) to your FluxCP.
My rAthena FluxCP currently is compatible with Hercules, item, monster db seems to be fine, do you know major issues with rAthena FluxCP when connected with Hercules server platform? Yesterday, item db seems to be not working properly, I am downloading someone files and now it working.