This is important!
I have a printer Wanhao Dublicator i3 V2.1. This holder may not apply to earlier printers.
But in the SolidWorks you can edit for your printer.
I connected the LED lamp to the power supply of the extruder cooler.
Micrometer bought here
Magnets bought here
Everything else can be seen on the photo.
And click on the left to «Tip Designer».
Wanhao Dublicator i3 V2.1
I printed with plastic PLA.
1x Bolt M3x15 (for light holder)
1x Bolt M3x35 (for micrometer holder)
2x Bolt M3x10 Chamfered (for base)
4x M3 nut
3x Round magnet 20x3
1x micrometer (0-12.7mm, diameter 57mm)
1x LED lamp from the car (dimensions on the photos)