HELP Inspiron N5010 hdd crashed. Need help,.

Hello:

My Dell Laptop Inspiron N5010 HDD crashed and i had to replace it with another one. Though i am unable to find any recovery cd or web link to download Windows 7 again on it. It came with Windows 7 pre-installed. The sticker at the bottom having license key has also gone in time and i dont have the key. I do have the machine tag details and all.

Please help.