You can go through this list and see what sites are still left:
http://shoptemp.net/country/Europe/
A shorter list, maybe:
UK
https://www.playmods.co.uk/
http://www.yeahgeek.com/
http://www.3dsgamerworld.com/
http://www.shop01media.com/
Somebody might be able to add more choices for you that are either closer or cheaper for you.
Cheaper, can tend to mean you will be ordering from a chinese vendor instead and waiting anywhere from 2-4 weeks for your order to arrive.
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If you are getting a R4 clone, make sure to read the description and look at what version of the 3DS it supports. The majority of R4 descriptions will list it or have it in the title as well.
If it doesn't, I suggest you avoid getting that one for now.
If it doesn't list any versions, I suggest you not consider these at all. They tend to only work in a NDS only.
If your getting the DS2, you will need to bookmark this:
http://forum.supercard.sc/forum-26-1.html
The DS2 update will be stickyed, usually within a few days to a week of a 3DS system update.
As for SNES emulation, if you never used it on a regular flashcart before, I suggest you forget that SNES emulation on a DS flashcart ever existed, it is not very good.