Topcat has put together a template that can be used in the creation of an alternative under bonnet slam panel \ fan shroud, see below:
You can download a zip file containing the template in Autocad, jpg and pdf formats here.
The Autocad template is especially useful in the event that your local engineering shop supports the use of Autocad in the fabrication of stainless steel sheet for example.
Disclaimer: while every effort has been made to ensure the template is fit for purpose, please ensure you confirm measurements before fabrication.
CJ