Hi Luca, as far as I know it's impossible to obtain the spark-lite kits from the UK, I assume it's same in Europe as well, your best bet is to go direct to the source at...

http://www.fourseasonssurvival.com

I purchased a couple of kits and a load of tinder tab refills last year and the shipping was only about $5, they also stock 'Starflash' signal mirrors, 'Fox 40s' & plenty of other interesting gear. You could email Keri-Lynn <sales@fourseasonssurvival.com> and ask her for a few shipping options & prices if you're worried about costs.

Hope this info is of some use.

Shako.