I just took a gander at the MAC facebook page and someone again asked if the Iris lipsticks would be re-stocked and here is there response (cut and paste because I can't figure out how to crop screenshot images on my computer lol)
MAC Cosmetics Hi Suzie! Sorry to disappoint. Iris Apfel collection is limited edition and we don't anticipate receiving additional quantities online at this time. (Etc etc. went on to explain store locations blah be bloop)
I don't know why that was said when just days before their page said they would restock.