https://www.ebay.com/sch/i.html?_nkw=Addon+8Gb+Ddr3+1600Mhz+Sodimm+For+Toshiba+Pa5104U+1M8G+Ddr3+8+Gb+So+Dimm&_sacat=0&_dmd=2

Addon 8Gb Ddr3-1600Mhz Sodimm For Toshiba Pa5104U-1M8G - Ddr3 - 8 Gb - So-Dimm

$121.00
$76.00

DDR3 - 8 GB - SO-DIMM 204-pin - 1600 MHz / PC3-12800 - CL11 - 1.35 V - unbuffered - non-ECC - for Toshiba Port g Z30; Satellite C55; Satellite Pro A30 A40 A50 R40; Tecra A40 A50 Z40