actually my MX518 came with an ASUS G1S-B1 gaming laptop...bought in this January from US
it's a real Logitech MX518 but the top design is changed by ASUS ( bottom remaining the same...printed Logitech MX518 ) and also uses the same Logitech Setpoint drivers that normal MX518 uses
here's a pic...
*xdigital-bg.com/theking/cho/Joomla.../product/76e444c15e8f22eaa8fb6cf3a57848be.jpg
anyways...i think that u can get normal ones here if u try hitting some good stores at chandi...coz earlier i've seen those on the showcases of some stores...tho forgot which ones exactly