Your car needs full body job. basically most of the suzuki fx and mehrans have no strength in their metal. the remaining strength goes out with the passage of time.
your car body has already good amounts of putty on it and u cant remove and mend the metal beneath it. so i would suggest to go for new metal parts available in the market. ask your dentar to do an honest job. atleast the new metal will may have some strength and it will take lesser efforts rather than mending the old ones.
You will not find any good condition doors and other kabli parts from shershah because the cars which reach sherhshah are already eff up.
please also take care while giving ur car to the dentar. check his reputation, his finished works and the time he takes to complete a job.
replace roof with pillars, floor pans. if ur car doors have original inner frames then replace on outer metal sheets and not the whole doors.
keep an eye on the gaps and the shapes because once it is finalized the dentar will be least bothered to amend the thing he has done.
"I have read all of its replies but still need suggestions for roofs and doors. As in your recommended thread the owners could not clear the flaws which you guys suggested and finally didn't share the final pics."
as for the above comments we have guided the guy but his dentar wasted his car..simple.