http://www.nds-card.com/ - GBAtemp's sponsor.
http://www.zhuzhuchina.com/store/ - Chinese import shop, so cheaper.
http://www.modchipcentral.com/store/ - NA-based shop, so fast shipping but higher prices.
http://www.realhotstuff.com/ - Another chinese import shop, but has stock in NA.
http://www.zhuzhuchina.com/store/pr..._1_4_4_compatible_wood_rev_c_max_1_piece.htmlDoes the 2nd one send cards with the latest 3DS firmware? mines 4.4.0