Are they still around? Kinda, sorta. 3D Doritos as we knew them (i.e., a vital laundromat snack) are dead and gone. But this February, Doritos introduced Doritos Jacked 3D in Jalapeño Pepper Jack and Bacon Cheddar Ranch. The chips have way more holes in 'em than their forebears, but the tenuous connection is still there.
Are they still around? Only in Canada. So you either need to shell out for the exorbitant shipping fee, or hit the nearest grocery store across the border. They are worth the passport stamp.