Some bad news then...
Plugs and sockets outlets for domestic use are explicitly excempt from common European rules. (See the "Low voltage directive", 73/23/EEC, ANNEX II Equipment and phenomena outside the scope of the directive)
In the latest revision work, only Italy and Portugal suggested including plugs and socket outlets in the LVD so for the forseeable future, the situation will remain unchanged. Plugs and socket outlets for domestic use cannot be CE marked.
This means each and every country in Europe can forbid foreign system of plugs and socket outlets.
What can work in your favour in case someone bring it to court is that the European plugs are all built and tested to the same international standard. With differences for the different types of plugs, of course. (The situation is even more bisarre if you look deeper into it.)
One suggestion is that you manufacturer looks into making a IEC 320 version of the mains block. A number of manufacturers make such. Shuttered versions are available. (I think Shurter have them) In addition, these can be dual listed for North American and European market.
("Supra" is the company that makes cables with "conductive insulation"... Need I say HiFi?)
