15 or smaller laptop with upgradeable CPU and GPU (used)

Hi
I'm looking for a (used) laptop with 15(15,6) "screen or smaller and as compact as possible
Laptop must have replaceable CPU (not soldered) and GPU (MXM 3.0 B), i know the problems with upgrad but other laptops are not considered
I'm interested in models from the last 5 years (starting from 2012)
I would like to also install Windows XP as the second operating system - needed for old software (+ Win 7)

Models I know about:
Clevo (Sager) P150 HM / EM / PM / SM / ... (can anyone explain...

15 or smaller laptop with upgradeable CPU and GPU (used)

15 or smaller laptop with upgradeable CPU and GPU (used)