Here's a simple and cheap 8 way DIP switch on I2C — Parallax Forums
TXS0102 2Bit Bidirectional Voltage Level Converter I2C IIC Digital Switch: Amazon.com: Industrial & Scientific
I2C 2:1 multiplexer application for TS3A24157 2 channel SPDT switch - Switches & multiplexers forum - Switches & multiplexers - TI E2E support forums
How can SOM communicate with PCIe cards connected onto PCA9548A (8-channel I2C-bus switch with reset) with PCIe switch in between - Jetson TX2 - NVIDIA Developer Forums
I2C - switch scl line - Electrical Engineering Stack Exchange
TCA9548A I2C Multiplexer: Use Multiple Devices with the Same Address on Arduino - YouTube