No. The Karma solid uses a polished solid version of PK 18. The Karma Green/Blue pearl used PK 18 pearl; it has been discontinued but is probably still available.
Some discontinued balls you should still be able to find:
The Damage used pearlized PK 18.
The Avalanche Solid and Avalanche Green/Black Pearl also used PK 18.
The Copperhead used PK 18 solid.