This is what I have found "scattered" around the web, feel free to make any corrections or additions if warranted. Can someone verify if these are correct?
Kanguru 8x (Rebadged NEC 2500)
Mad Dog 8x (Rebadged NEC 2500)
Phillips 1620 (Rebadged BenQ 1620)
HP 630 (Rebadged BenQ 1620)
NuTech 16x (Rebadged BenQ 1620)
Sony 710 (Rebadged Lite-On?)
I/O Magic 16x ( Either Rebadged BenQ 1620 or BTC)
Pacific Digital Mach 16 (Rebadged BenQ 1620)
Anybody know what companies used the NEC 3500 for their drives, and does anyone use the NEC 3520,currantly?