Amazon.com: P7450 2.13GHz Socket P (PGA478) 2-Core Laptop CPU Processor SLGF7 Compatible Replacement Spare Part for Intel Core 2 Duo Mobile Compatible and Other Laptop Systems : Electronics
PC CPU PGA478 Intel Pentium 4 2.80GHZ SL7PK Pga 478 Processor Socket Computer | eBay
Intel Core 2 Duo T7600 2.33GHz 4MB 667 MHz Socket M, PGA478 CPU Processor Tested 735858190077 | eBay
Intel SL88G - 2.80Ghz 533Mhz 1MB PGA478 Intel Pentium 4 511 CPU Processor - CPU Medics
PC CPU PPGA478 Intel Pentium 4 2.40GHZ SL6DV Pga 478 Processor Socket Computer | eBay
Supported Processors
Socket 478 - Wikipedia
Socket M / Socket mPGA478MT
Core Duo/Core 2 Duo MacBook CPU Upgrading | MacRumors Forums