I can send you a 3d alternate art card for the one you are missing. Won't match the rest but you'll have a complete set. I can also beat the ebay price of 4 dollars for the 3d card...free!
You don't use your alternate art Black Widows? I only use those now and I've shelved the originals. Not really willing to part with them yet for the OP -- keeping them in case of emergencies.