Where to buy benq 1620 pro?

From where can I buy benq 1620 pro? which web site? in USA?

The NU Technology Black 16X DVD+RW/-RW Drive, Model DDW-163 BLK at NewEgg for $66 delivered is a rebadged retail boxed version of the BenQ 1620 Pro. The only difference between a BenQ 1620 and 1620 Pro is the later firmware versions, and this drive uses BenQ hardware and firmware.