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Snap-together Manual Z-axis for cheap laser engravers by dkj4linux | Download free STL model | Printables.com
Autofocus Sensor Kit with Z-Axis Motor for 50W and up CO2 Laser Engraver Cutter | eBay
CNC Laser Engraving Z-axis Adjustable Module Mounting Frame For Device Parts | eBay
Laser Engraver Module | Z Axis Laser Engraver | Router Laser Module - Woodworking Machinery Parts - Aliexpress
Amazon.com: Lightobject Power Z Table/Bed for Small CO2 Desktop Laser Machine (Ideal for K40 Upgrade) : Home & Kitchen
K40 power Z table
Amazon.com: Cloudray Auto Focus Focusing Sensor Z-Axis for Automatic Motorized Up Down Table CO2 Laser Engraving Cutting Machine Used for C Series : Arts, Crafts & Sewing