Vector Images/ Graphic Website Mascots/ Characters

We need some vector mascot/ characters in png format for our website. These characters will need to portray young (18-24) professionals in various poses, including:

1. Writing/ at a desk
2. Using a laptop/ PC
3. Using a professional camera
4. Presenting/ using a flip-chart
5. In sportswear/ with sports gear
6. In chef whites/ with kitchen equipment

Male and female character vector poses, so to have one of each of the above (12 poses total).

Inspiration to be drawn (forgive the pun) from the female characters on the following sites:

http://www.bannersnack.com/en/
http://www.flipsnack.com/
http://www.photosnack.com/
http://www.slidesnack.com/
http://www.sharesnack.com/

The same high quality detailing is required.

Main colours to be used for clothing: Orange #ff9900 and Purple #6666cc

Hair colours to be 2 toned as on the girl on the above links - brunette/ blonde/ maroon - sensible colours please!

Equipment/ furniture colours can be any but must be fitting with the other colours.

Transparent backgrounds and resizeable as png images please.

Please submit your best fixed price for the whole job - note that we will be selecting the winning bid based on quality of previous work/ what you can do, rather than price.
We will consider every bid based on merit.

Many thanks