I have read a ton of research on google and found that the best option is from amazon.com
I also got very fast&free shipping from amazon for more than 50 usd items.

1GB DDR2 Memory Upgrade 4-0E902E Toshiba A135, A135-S2246, A135-S2256, A135-S2266, A135-S2276, A135-S2286, A135-S2296, A135-S2306, A135-S2326, A135-S2336, A135-S2346, A135-S2356, A135-S2376, A135-S2386, A135-S2396, A135-S2426, A135-SP4116

Monday, 23. November 2009. 22:48 by memory sdhc

1GB DDR2 Memory Upgrade 4 Toshiba A135-0E902E, A135-S2246, A135-S2256, A135-S2266, A135-S2276, A135-S2286, A135-S2296, A135-S2306, A135-S2326, A135-S2336, A135-S2346, A135-S2356, A135-S2376, A135-S2386, A135-S2396, A135-S2426, A135-SP4116 List Price: Too Low to display
Want more discount? get it here -> compare price
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KTT533D2/1G, PA3411U-2M1G These modules can be from Infineon, Micron, Hynex, Adata, Kingston, Elpida, or any other ever produced on availability. This item is in stock. 1GB PC2-4200 DDR2-533 1. SODIMM 8V. Live exchange or repair warranty against manufacturing defects. Compatible with Toshiba Satellite A135-0E902E, A135-S2246, A135-S2256, A135-S2266, A135-S2276, A135-S2286, A135-S2296, A135-S2306, A135-S2326, A135-S2336, A135-S2346, A135 — – S2356, A135-S2376, A135-S2386, A135-S2396, A135-S2426, A135-SP4116 (DDR2-533MHz), A135-SP4108 (DDR2-533MHz), A135-SP4146 (DDR2-533MHz), A135-S4407, A135-S4417, A135-S4427, A135-S4437, A135-S4447, A135-S4457, A135-S4467, A135-S4477, A135-S4478 (DDR2-533MHz), A135-S4487, A135-S4488, A135-S4498 (DDR2 – 533MHz), A135-S4499, S4507 Laptop A135, A135-S4517, A135-S4527, A135-S4637, S4827 Laptop A135, A135-S7404 Notebook (DDR2-533MHz), A135-SP4016 (DDR2-533MHz), A135 – SP4048 (DDR2-533MHz), A135-SP4058 (DDR2-533MHz), A135-SP4088 (DDR2-533M
buy it now!