Mr Taisen Lee, the question which has to be answered first is whether or not the stoves would pass the official test. With a level of transport costs that high, it would be a better idea to buy a Testo 300 gas analizer yourself, plus a small laptop and the Testo software to do several
online testruns. It would be much cheaper than the cost of the stoves plus transport. That way, it would become possible knowing the stoves would pass the certification test before shipping those to the EU.
I have to delve into the requirements, in order to provide you with the right method to mimic the certification test. The only requirement you won't be able to check is dust concentration in the exhaust gases. The Testo 300 doesn't provide this functionality, sadly to say. In combination with another Testo device it will though.
I don't know anything about the requirements in the USA, sorry about that.