Art, vector art, photos and other digital designs to be sold

I am starting a website that supplies original stock art for any use. This needs lots of pieces of simple artwork that has mass appeal and could be used for new websites, brochures, books, magazines, etc. I have seen many of these websites and their billing structure tends to be very confusing and difficult for the customer to quickly get art and use it as they see fit. I would like to change that by selling them art work that they could download and easily change in photoshop, illustrator or whichever program they use. This means I would like for them to download the file with all its original layers rather than a merged file that the customer needs to break up in order to edit. That being said, they should also get the merged version as well as a jpeg, gif, or tiff of the image as well. What I need is for artists that could help me make these. If you can make several images that are beautiful, funny, functional, professional abd high quality and do so in a timely manner, then I need you. I need artwork in just about every category: actions, animals and pets, architecture and buildings, arts and entertainment, beauty and health, business, communications, concepts and ideas, financial, food and drink, holidays and celebrations, humorous, illustrations and vector art, industry, isolated objects, lifestyle, medicine and science, music, nature, objects/equipment, occasions, patriotism, peace, people, places, politics, religion, sports and fitness, technology, travel locations, traveling, transportation