https://khronokernel.com/macos/2022/03/01/5K-MONITOR.html
https://www.ifixit.com/Guide/Convert+an+iMac+Intel+27-Inch+E...
https://www.aliexpress.us/item/3256802134515555.html
https://blog.lewislovelock.com/turning-an-5k-imac-into-a-mon...
https://www.ebay.co.uk/itm/203666708700?var=504097344943
https://mschmitt.org/blog/convert-5k-27-imac-external-displa...
https://www.aliexpress.us/item/3256802548599862.html?gateway...
https://www.aliexpress.us/item/3256804264671858.html
I didn't bother to mess around with mounting, I just used command strips to attach the driver board to the back of the monitor and mounted the monitor on one of these clamp-type stands:
https://www.amazon.com/dp/B01MFDQR5D
The heat sink on the board can get warm but nothing to worry about regarding being mounted to the monitor.