I've used one or two of those by just drilling the appropriate hole in a desk or workbench. Or clamp a wood block to the back of the unit and drill the hole in that.

https://www.amazon.com/Replacement-Aluminum-Cantilever-Diameter-Adjustable/dp/B07MJR49GH

If you're determined to buy something, a modern LED version of that entire light is probably not more than triple the price of a clamp alone:

https://www.amazon.com/Desk-Adjustable-Eye-Care-10-Level-Workshops/dp/B08KXNC1D7