The handbrake sleeve is not removable. It is glued on to the lever. I purchased one just for the heck of it and tried it even though no guide had been posted. It is technically possible but you have to destroy the old lever cover to install it.
The size of the button is right but if you don't have another one of those covers to install you are definitely going to make the Z look cheaper than it did.
In all of the videos of 240's and FRS's that boot just slides right off, ours does not. But post pics of how it goes
mine just sits in my center console right now.