Salam to all,
I faced the same side mirror problem as all other mehran owner's. But luckily i found just what i was looking for i a very affordable price t my Door steps.
https://www.facebook.com/autorearview/
This product has all the qualities we need (Convex mirror for wide angle view, vibration free and large size). They have made my driving very easy. I strongly recommend these mirrors.
Best Regards.