Seagate Momentus Thin 500GB Internal Hard Drive - 2.5 Form Factor, SATA II 3Gb/s, 5400 RPM, 16MB Cache, OEM Package - ST500LT012 at TigerDirect.com
Seagate 500GB Laptop Thin Internal Hard Disk Drive ST500LM021
Seagate ST500LT012 500GB Hard Disk Drive For Laptop PC 5400RMP 64MB Cache 2.5 inch HDD SATA3.0 6Gb/s Interface 7mm Internal|Internal Hard Drives| - AliExpress
Seagate Momentus Thin 500 GB,Internal,5400 RPM,2.5" (ST500LT012) Hard Drive for sale online | eBay
Seagate 1DG142-540 - 500GB 5.4K RPM SATA 7mm 2.5" Hard Drive - CPU Medics