IndustrialField 10pcs CD4013BM CD4013 HEF4013BT HEF4013 SOP-14With Each Other Flip Flops Dual S: Amazon.com: Industrial & Scientific
CD4013 - Dual D Flip-Flop CMOS IC with Free IC Base for Electronic Circuit, DIY - Pack of 5 Pc | Reliable Flip-Flop Functionality | Versatile Applications Construction by TPS : Amazon.in: Electronics