Hmmm contact to any good electrician specially meter specialist i think coil worth is max RS 500 to 700 in khi market.If coil is not available i have a solution for you that is providing seperate eart/ground for weak coil throug wire jumper to any body bolt or nut.
Noted that normal meter consist of 04 coils.
One for temperature gauge.
One for Petrol gauge.
One for speed gauge.
One for RPM gauge(Optional).
You can only replace temperature gauge or make it proper extra grounding.
Also check your temperature switch before doing this.