I fail to see why we need a new thread on this, why not post in the old one just reviving that?
As already posted there, the proposal is more than just a new print, as there are not 'currently' yellow under that many keys.
Sure it is feasible, but come at a cost - and possibly delay(!) - if they have to change the base they already use, and add more yellow stickers before the black layer is printed.
(of course the material cost of the stickers should be negligible, but it is likely to come at a cost to ask the supplier to modify their process)