Need to transfer to new computer, but base game wasn't registered to origin

So I was trying to transfer my game to my new computer today, because my old one died, and after I transferred all my files it said that I needed to install the base game still, so I went to origin to see if it would let me download from there but it said I only had supernatural and pets registered, but I also have the base game, seasons, and ambitions. How would I go about getting the base game and other two expansions back? The only discs I can find now are Seasons and (maybe) supernatural. :L