I have looked all over the net and ebay and cant find any for sale anywhere and not even much info apart from this thread, so thanks heaps for your info Justin.
I have a few team sets of 2009 JDCs similar to that....have not seen any others like them at all. May have been a once off error in production because the cards are in sequence from 1 to around 45 but the backs on them are 46 to 90ish and are upside down. The 90th card was all creased and mangled as if the printing machine shat itself so perhaps production went back to normal then....In any case, i still have them all.