Desktop Wallpaper Designers

I need someone to design 12 desktop wallpapers all with gambling themes.

The themes will be:
1) Roulette table and players winning
2) Craps table with players throwing dice
3) Blackjack
4) Texas Hold'em Poker
5) Bingo
6) Valentines Day at the Casino
7) Slot Machines being played
8) Jackpot Winners
9) Christmas Miss Sexy Santa playing cards
10) Scary horror/halloween guy/people and horseracing
11) Las Vegas
12) Mah Jong Chinese gambling game

All wallpapers will be created in the following sizes:
1024x768
1280x1024
1680x1050
1920x1200

Bidders will be required to show a portfolio of past design work.