According to the kind Mr/Mrs Lui, (AliExpress) the free shipping was set to 26 countries by default, but free shipping to Nehterlands and other seemingly not supported countries is possible. He/she stated that you should choose the EMS shipping, and ask them to revise the price for you. Will try after my busy weekend for I am now at work, but hope that helped!

As promised, below is the photos of my extreme simplistic, no-hassle, solder free dual batteries mod . I just connect the 4 pins using two solder wire (no soldering), so it is very easy and everyone can do it. Some one may think it a little fragile but it works for me .
BTW, AFAIK, if we use USB charge then the max current would be only 500 mA, so the wire will only tolerate 250mA, which I think is quite ok for them, and I always charge using the USB port :-)
Picture:

Top view, the two wires are soldering wires (Note: I use a nail cutter/trimmer to create two tunnels on top of the bottom battery near the pins out , so that the wires would fit in and not extruding out


Bottom up view, even with these wires, the batteries fit in the phone perfectly:


Top down view of the two batteries:

donated 2 €, hoped better results though :S

'cantruchd' That's yet another way to do it, and also a good way if the connections doesn't come loose, because then weird battery levels will be reported (voltage) if the battery goes from single to dual now and then, but really smart way to do this , simple yet effective, and still having the option of 2x single battery's if ever needed, i will try to do the same with a future scud mod, and make additional tutorial in post #2

'Pillum' what do you mean????

Yeah in my case the wire is tight and I'm quite sure it will not come loose easy (maybe only when you drop it, but then of course you have other things to worry about )

Yeah please make and test the mod then post it on the guide, all rights reserved for you

my way was to glue original battery to the backcover so when cover is removed the battery comes out too. the i did a little hole in the back cover and put some wires trough it and then connect the wires to the "inside battery" and glued another battery to the outside of back cover and then connected the wires to it. did not need to order mugen cover and to original lens cover is there too works fine but charging time is double the time that it would be with just one orig. battery. i was expecting this though

some pictures. note that this is not the final solution, it still needs littlebit of fine tuning.

Yeah this is also very nice. The thing I miss most when using the mugen cover is the camera cover.

But using this you need to secure the outside battery as I afraid it may come off if too much force is applied.

Waiting for your final solution

BTW, I think you don't need to connect the test pin, as this will reduce the inner resistance of the resistors, which will result in lower mAh reading. For more info please see these link:
http://www.cpkb.org/wiki/Nokia_BL-5J_battery_pinout

http://www.cpkb.org/wiki/BSI

BTW, what is your charge time for the two batteries?

Umm... overnight?
Can't really say more accurately, but if batteries are empty at evening, they are full in the morning.
I think it's double the time compared to single battery.
these batteries seem to last the whole day even in power use