I guess I got it from Soundglitz, Bangalore. You can check it out at most music stores as it is amongst the most popular stomp boxes from Boss.
I would recommend that you try it on a similar setup to your own in a store before buying because it works well for some crude modern sounds but not for more refined and cleaner/cutting sounds. I get a very good Slipknot tone out of it for artists like Slipknot, Lamb of God, InFlames etc where excessive tight gain is required.