Maybe it's just a matter of having the information, I can't see any reason whatsoever for anyone to buy an organic material from overseas.
I see so many sources for substrate, and there is another insect site that caters to the states- Insectnet.com, it's mostly lepidoptera, but it is
all entomology and where I purchased my lucanus elephus grubs, live dynastes tityus adults, and live dynastes granti adults.
And, perhaps it is just having the information, I've learned quite a bit in the short time I've been using this forum. What comes up first in a search,
isn't always your best choice. Networking, and asking questions, which is what these forums are for.