Call For Help - Poss Ecu Issue Options

[trek]

Hi

This is really a call for advice and help as I am properly struggling here. PLEASE HELP.
We think my ecu may have been fried when recently a 'friend of a friend' used a MiG welder to repair the floor on my PH 1 145 QV.
Was running fine beforehand, running awfully after. Barely running at all actually.
I will post more details after, but IF I need to replace ECU what sort of job is this? Will need keys and locks also I imagine, but anything else?
Anyone 'in the know' you can recommend for advice or to do the work.
Basically I am desperate here and out of my depth - just want it running properly again.

Based near Chester.