I'd love to be in a toy shop right now - as a customer with a whole bunch of money, of course. *giggles*
Aaaah, the Eclipse-Stuff... only the third set was an exclusive, the other two can be bought in the shop.
Avatar of the Sun + Avatar of the Moon --> Reward Avatar of the Eclipse (former event back in... dunno, 2011 or 2012)
I guess you thought of that set?
If you use this link and just click on the sets with the abbreviation [ex] (for "exclusive") after their name, you'll find pictures of all exclusive sets. :)
If you search for the English name of the set, I might be helfpful. I can look up all sets in my inventory by skipping languages.