Thats pretty much why they abandoned the ecodisks a long time ago.
I suggest emailing the customer service people and asking nicely if they have any left. Other than that, they might have copies they can burn to discs or online copies they can point you at links for.
i5 4440 3.1Ghz, Asus H87M-E motherboard, 8GB DDR3, 2GB DDR5 nVidia card, 2x500GB Seagate hd, Coolermaster 750W PSU running Mint 17.1 MATE and Win7
HP mini, 1.66 Ghz Intel atom processor, 2 GB DDR3, 320 GB hd, Mint 17 MATE