To answer your question, Yes - pre-paid maintenance IS an option.
To clarify for you, no cost maintenance (brakes, oil, etc) is NOT part of any CPO itself. CPO is considered an extension of the 4yr/50kmi original warranty.
Maserati GT 4.2
Range Rover 4.4
Dodge Ram 1500
PAST: ALPINA B7, e63, e39, e39, e36