The other day my PS3 SLIM stopped reading disks. I disassembled it and cleaned it (including the blue ray and dvd lens). I tried loading a disk with the top half of the case removed and i noticed that the disk doesn't spin at all. So, after lots of research, i've come to the conclusion that i need a new laser lens and deck.

Right, the thing is, it looks like there are numerous models to chose from. I don't get if i need a specific model or the different models have mechanisms etc.

My questions are:
Do i need a specific model? If so, how do i find out which one?

Which model would be the best to buy?
The best and most reliable place to buy them from off the internet? (In the UK)
Has replacing the laser lens and deck made your ps3 slim work properly again?