Aloha and Mahalo Bass! I tried checking FF website for any retailer in Europe but didn't find anything. You might have to order and have shipped from somewhere (ebay, amazon seem to have good prices, or any other hydro store). Maybe you know already, but its a two part flower nutes, Tiger Bloom is the macro-nutrient (2-8-4) and Big Bloom is the micro (.01-.03-.07). I would recommend if you do decide to try, buy the 32oz (quart) of the TB to 128oz (1gal) of BB. About the highest dose of TB I use is 5 tsp/gal, the BB I use up to 1/2 cup/gal, so I burn thru the BB WAY faster. Even with the # of plants I am running I am still on my first gal of TB after about a year (its almost done, just a few more feedings) and I think I have been thru at least 5 gal of BB in the same time. If you every decide to try their veg nutes (Grow Big, 6-4-4), they go even farther than the TB, I am still less than 1/2 way thru a gal in a year (I am thinking of donating the remainder to a friend just so I can get some fresh stuff), so go for the quart. I would love to see you run a comparison, you already have such great results going on your current grow so it would be interesting.
Thanks for checking out my grow and have a good one brother!