What is a good reliable source to buy a ps3 laser from? please help

[korollis]

My ps3 stopped playing games, blu rays, standard dvds, and audio cds, i own the 40 gig version, when i put a game in i see the loading bubble but thats about it.

I phones sony and they want to charge me 150 dollars, but for that amount i will instead buy the laser myself and replace it, i've taken it apart already and noticed that when i put a game in the laser shines red, however the disc does not move at all not even a centimeter nothing!

I will be ordering the complete assembly which is the KEM-400A the motor and laser, but my only concer is who do i buy it from?

Please any help would be greatly appreciated, if you have bought a laser from a reliable source please let me know, Thanks in advance.

Rob.