Starting from a 100x60cm panel, bent 90° top edge, manually predrilled the holes ...
... cut to fit the nose ...
... handfiled all the openings to suit the steering, suspension and exhaust.
All this has been achieved with essential tooling like this tinsnips and file. Some of the many workshop words of advice are, go on slowly, measure twice cut once, make a pause, look at it again before you go on, compare with the damaged panel, compare with the mirror symmetric other side of the car, measure again ... and so on. The result is rewarding.
Cheers.