Mobile App Towing Vehicle Icon

Job ID: 38317645

Budget: £20 – £250 GBP

I am looking for someone to create a towing vehicle icon for me. The icon will be primarily for mobile app use. I have attached an example of the kind of icon that I want.

There are currently thousands of similar icons available for sale but some of them have different licences. Rather than waste too much time searching for the exact icon that I want with the exact licensing terms that I require, it's easiest for me just to create one from scratch where I have full ownership.

These are my requirements;
1) Proof of originality: I need some kind of proof that the icon was created from scratch and not just someone else's icon. Perhaps a couple of files in the initial stages of the design sent together with the final file?
2) Sample: The attached icon is actually perfect for my needs. I just want one done with enough changes to differentiate them. I don't want the flashing light on top of the truck.
3) The format: I would prefer it done in both duotone and black and white formats.
4) The format: Ideally I would prefer a photoshop (psd) format.
5) The size: the attached icon should be used as a guide (ie: width of about 4000 pixels)