There's an ebay uk seller that has some, gregory. Easy to find if you search ebay (although I think the seller might be in Poland on reflection).
I was tempted by this but as I don't really like the Radiant, I'd be buying it more for the tin. I wish it was a favourite deck of mine as decks in tins are so loveable.
However - top tip - do as I do - buy chocolates in tins and gorge compulsively so as to have a stash of empty tins for decks. Amattler of Barcelona do some lovely tins and Sorini of Italy do a gorgeous tin with cherubs which perfectly fits the full size RWS (whether it's the Original, blue box plaid backs, Universal Waite etc.)