Based on this product's specifications, here are some alternatives and similar models
Powercord ACT C14 to C21 IEC60320 red 3 m, 250 V 10 A
Summary description:
ACT Powercord with IEC60320 connectors C14 (inlet) to C21 (outlet), red, 3 m length. Rated for 250 V and 10 A, this mains cable connects compatible power supplies, servers and IT equipment using IEC C14/C21 interfaces. Suitable for rack-mounted devices and data centre cabling where a C21 outlet is required.