Gavin Webber's daughter had a tiered wedding cheese: https://www.youtube.com/watch?v=plNZjRD5JL4 (video is only 2 and a half minutes). It might give you some inspiration.If you are going to Barcelona, you'll be able to find a cheese shop with a variety of European cheeses. I've never been there, but I would find it incredible if you can't find a specialty cheese shop willing to sell you wheels of cheese. Knowing Spanish may help, though... Any ideas on the kind of cheese you are interested in?