Currently Being ModeratedApr 15, 2013 3:57 PM (in response to Andrea Thompson)
Gray restore disks are model-specific. If yours came with an older version, you cannot buy a gray restore disk for a machine that came pre-installed with 10.5. Your only solution is to buy a retail copy.
Currently Being ModeratedApr 16, 2013 9:55 AM (in response to Andrea Thompson)
Restore Tiger 10.4 & Leopard 10.5 DVDs are available from Apple by calling 800-767-2775 as of January 20, 2013. Have your serial number ready.