I was curious about this too. LiteOn seems to be dropping off the face of the earth with DVD-ROM drives. Sad, as I don't care much for the alternatives.
I will say that my LiteOn 167T works every bit as well as my 166S and seems to be slightly higher build quality. My guess is it isn't JLMS though.
Intel Q9450 @3.2GHz, Gigabyte GA EP45-UD3P, 4 x 2GB G.Skill @4-4-4-12
Antec P160SW case (modded), Xigmatek 750w PSU
3x 500GB (RAID-5), , OptiArc 7200S, ASUS E818A3T
Creative X-Fi XtremeGamer, Hauppauge HVR-1800, Radeon 4890