Apparently, a coating of some sort is applied over the paper where you want people to sniff, which is done by machine, so I don't think there are "blank" scratch and sniff papers for you to create your own. I think you might be able to supply a fragrance to one of the shops to make them for you, but otherwise, I guess you could just spray cards with an ultra fine mist. I did that with some postcards I sent out. I had some customers tell me they loved the way the cards smelled, and the post office really loved me for that. The problem is, I didn't spray each and every card, since I was mailing 500 cards. I bundled them and sprayed them.