Where to buy g2 lenses?

Hi, i've just bought from Blord the WF-501B 445nm 1.4 W laser, i've seen that this laser can mount G2 Lens, i've not bought directly with g2 but with 3 elements AR for economic reason, in future if i want to upgrade the laser with a g2 lens where i can buy it? i've searched in a lot of sites and i've found only G1 lens for 99 $ :na: (survival laser)... and, another important question i'm a real newbie, there are some great guide (here on the forum or in other site) that explane the difference between the different tipe of lenses? (i've just serached it with search module but i've not found nothing :yabbem

https://sites.google.com/site/dtrlpf/home/glass-lenses
or contact jayrob

hey thanks!!

Worth a read >http://laserpointerforums.com/f64/fs-405-g-1-glass-lens-mod-31-increase-vs-aixiz-22497.html

You should try the laser first with the 3-element glass lens. At 1.4W it is no weak laser.
With the G1/G2 lens it burns just a split second faster