Uh, no. This service is for residential clients only. It's not worth the risk or liability doing a bypass on a machine in a business environment. I've had clients who say they're cheap but with a little bit of pressure most come around if you explain to them WHY they need to spend the money, even if they grumble. If he were my client he'd either need to agree to replace the units, upgrade the motherboard/CPU on them so they're officially supported, or go somewhere else. I'm doing quite a few motherboard/CPU upgrades as well. I have a nice stock of mATX motherboards and Athlon 3000G CPUs that I've stocked up on for just this purpose. I got the motherboards, CPUs, and 16GB of DDR4 memory all for like $120 on sale like a year ago. Add a couple hundred for labor and it's a good value proposition for clients who have towers with standardized mATX form factors. I also bought a bunch of 5600G CPUs for clients who need a bit more power than the 3000G provides. I offer those as a $150 upsell and quite a few people have taken me up on the offer.
NOTE: Be careful about the Athlon 3000G. AMD made two versions of the processor and only ONE of them is officially supported on Windows 11. If you find them for a good deal today, they're probably the versions that aren't supported in Windows 11.