Gig Extras for Illustration Work - Need Ideas!

[jonathankantor]

My Gigs all fall under the Illustration section and I could use some help with Gig Extras. At the moment, I have the following extras:

Put your art onto a Poster, Mousepad, postcard(s), T-Shirt, Mug, and deck of cards.

The problem I have is that people don’t buy these because they can just take the digital image I deliver and make their own tangible items if that’s what they want.

My question to the community is, what are some good ideas for illustration Gig Extras that I can use to entice buyers to select them?