Copper / Aluminum Heat Sink Kit for Raspberry Pi - Micro Connectors, Inc.
Aluminum heat sink - Power Products International - extruded
Aluminum Heat Sink for Raspberry Pi 3 or 4 - 15 x 15 x 15mm : ID 3082 : $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Amazon.com: Aluminum Heat Sink Heatsink Module Cooler Fin for High Power Amplifier Transistor Semiconductor Devices with Dense 19 pcs Fins 11.8"(L) x 5.51"(W) x 0.79"(H) / 300 mm (L) x 140 mm (
Addicore Raspberry Pi Heatsink Set
DC-HS11118 Aluminum Heat Sink Kit 109.3 x 58.5 x 18mm
Amazon.com: 4PCS Heat Sink Kit 40mmx40mmx20mm Aluminium Heatsink Cooler for Cooling VRM GPU Stepper Driver 3D Printers Stepper Motor NEMA 17, TEC1-12706 Thermoelectric Peltier Led : Electronics