I was thinking about this, If you used 2 bonnets would be the same as cutting one down the centre. Its still not going to be wide enough.
Don't know how he'd go adding extra metal down the centre to join the 2 sides,
Therefore l think he'd need 3 bonnets. One to cut say 250 mm? from centre either side. Then cut the left & right sides of bonnet 2 & 3 the required distance to fill the gap.
Then there is the length? Is the bonnet(s) going to be long enough? If not, more bonnets are going to be needed?
The front bumpers would be easy after the bonnet(s) if successful?
F#ck! glad l'm not doing this job!