Spanish customs are notoriously (we've learnt) a pain in the ass for receiving anything from the states, we tried a few times to get the supersoil amendment mix across, whilst gbd was here with no luck,
I think you're correct in saying it's difficult to get products like this with multiple organic ingredients across.
I know this is true the opposite way, when speaking with biotabs they said they have a huge demand for their product in South America however it's impossible to get through customs, apparently they require a full analysis to let it in, but the labs they have there aren't capable to conduct the tests.. So essentially it means they'll have to set up production over there to fulfil that market.
Cheers
Mitch, if you ask me, there is nothing fair or equitable about shipping just about anything organic from Europe to America. As a consumer I've found that the cost of shipping from the EU to the US is generally more than the price of the product, and of course, that's not counting the hoops everybody has to jump through just to please customs.
However, if instead you were shipping from China to the USA, I swear to God you could ship radioactive mad cow poop to America (with "free shipping" no less) and customs wouldn't bat an eye...