Concept Drawings Needed for Commercial Roofrack Design/Application

Fast turnaround preferable!

Essentially, I need 4 x drawings featured a commercial van (e.g. Ford Transit) illustrating the design idea for a new commercial roofrack for tradespeople.

The 4 drawings would show the different stages of the roofrack in-situ and in use.

No need for full colour rendering; simple/basic line drawings will suffice if necessary.

1. NDA will need to be signed prior to full disclosure of concept
2. Please submit Portfolio / Examples of prior relevant work

Thanks