Unfortunately some of the promos are incredibly difficult to find. Most of the 0D cards are tough to get for a reasonable price. There are Ebay listings for almost all of them at the moment, but you'll pay a pretty penny. I was fortunate to get 0D13 and 0D14 back in 2011, and I just now got 0D9-0D12. Note that 0D15-0D24 do not exist IRL.
Sadly it's a waiting game, once in a blue moon a gem will appear on Ebay. Sometimes I miss it, sometimes I don't, and frequently I don't want to pay what is needed.