Pictures seem to show that 1 new wing is required, but if insurance has put it up for salvage my guess is that the frame has been twisted.
To give an idea of cost. My 4/4 had two new wings & cowl plus other front end bits.
£10500 (2014)(Frame/Chassis was fine)
Blimey, it's amazing how costs mount up, isn't it? At the other end of the scale I put 4 new fibreglass wings on mine for less than £2k.
Hopefully this car will be back on the road soon.