Amazon.com: Waveshare Accessory Compatible with Raspberry Pi 4 Model B 4GB RAM with Powerful Processor Faster Networking Support Dual 4K Output and Different Choice of RAM Comes with a Copper Heat Sink :
Raspberry Pi 4 Model B 4GB RAM
Amazon.com: DIGISHUO Raspberry Pi 4B Model B 2/4/8GB RAM DIY Kit Case Fan SD Card Micro-SD HDMI (2G Module 8 in 1 Kit) : Electronics