in Multan - Ustad Shabbir (opp Khabrian ofc near Derra Adda) and Ustad Mirza (towards Punjab Ac near Derra Adda) are two guys who have good SUV experience.
If you want reasonably transparent auto parts shop, try 2nd or 3rd shop on right side in Auto Plaza Derra Adda (ask for Pajero parts specialist), he is usually transparent would give you options and explain the difference etc.
although the above mechanics have alot of SUV in there workshops, limitation of expertise and parts still exists in Multan.