By the way, don't post on threads more than a month old. Only if you have something special to say.
This is called Necroposting and is frowned here in the forums...
Moderators will notice if you start posting just for getting to the B/S/T area (20 posts)... Play it fair bro.
If you want to buy a laser diode, start by learning what are "wavelengths" and "power", so you can choose one. Use the LPF search!