They are still available. I believe the CO will come out to your place and verify the damage and issue you a certain amount of crop depredation tags. If you don't have a number for your CO you can call KDFWR at 1-800-858-1549.
Bingo, this is exactly how it rolls. I use to get them every year. Had 28 issued to me in one season before, we filled 17 of them with slickheads that year.