Got the Eye-Fi Pro X2 8 GB from Amazon for US$91.49 together with my Cocoon Grid-It. Shipping cost US$21.46 in total.
The Eye-Fi is not officially sold in Singapore so you have to either get it from resellers who bought it overseas or you get it directly from Amazon. The Eye-Fi Pro X2 8 GB cost about S$160 when you get it from resellers in Singapore, it is more expensive, but you do not need to wait 1 to 2 weeks for it as normally they got ready stock. Amazon is cheaper but you have to wait 2 weeks (in my case) for it.