Ah, you should look for "lenticular" instead of 3-D.
Here are all the sets COMC has had in stock with lenticular in the title.
https://www.comc.com/Cards,sc,=lenticular,ot,i100
This is what I would call a 3D card:
2006 Sports Illustrated for Kids Series 4 - [Base] #111.2 - Tom Brady (3D)
Courtesy of COMC.com
But then there are also cards that have varying levels of thickness whick could also be considered 3D.
2005 Topps Rookie Cup - Original Manufactured Relics #1974-173 - Randy Jones /6
Courtesy of COMC.com