HP Laptop
Harddisk and os problem

I have purchased HP laptop in july

laptop harddisk show error& HDD error (303)

model no wz500PA

product no dv6 - 3043TX

serial no CNFQ163G9J

my laptop is out of warrenty period..

i replaced hard disk, service center kept my corrupted hard disk with them and give me new hard disk with payment of 78500 rs.

Now my recovery disk of windows 7 also got damaged so i want original copies of DVD of windows 7 OS.