Current now contains the ATA-mkIII version so no patches needed.

Latest ATA patches for RELENG_5:
ata-mk3n-releng5.tar.gz
ata-mk3n.diff-releng5.gz

ATA enabled tools:
cdrdao-1.1.7-ATAng.tgz
cdrtools-1.10-ATA.tgz

Last mkIII patch set before it was commited to -current.
ata-mk3m.diff-current.gz
ata-mk3m.diff-releng5.gz
ata-mk3m.tar.gz