I need latest firmware for Liteon DH-16A1L

Hi, im looking for the latest firmware for the Liteon drive, here is information on this drive:
S/N - 251717416624
P/N - 5188-7537
V/M - PBDH-16A1L
Model - DH-16A1L

My current firmware is KH15.
Im just looking for the latest binary file.
Thanks.