Yeah, I'm pretty pissed about that because I never got the chance to buy the first season (I held off until they released them as single-sided, but then I never got to it). Stupid Sony.
eBay and Amazon Marketplace are your best bet for the first season, but it'll cost you a few pretty pennies.
I did the same thing, I waited till they got rid of the double sided crappy ones. I have seasons 3&4 of the Starburst packs, never got to buy Season 1.