Professional Letterhead Needed (Design Only)

I would like a PROFESSIONAL LETTER HEAD DESIGN. I already have the letter written. I just need a design so that I can put the letter on it, before I send it to corporate for review. I really don't know how to describe this task, as it seems pretty self explanatory. There are no tricks, or complicated instructions. I just simply need a letter head for my organization. The organization (initiative) can be found at: lazafricainitiative.org. I want a graphic on the top of the letter (i.e. a header), as well as the bottom (i.e. the footer). Please see the website and get some good ideas on how to do this. Both graphics (in header and footer) should not be too large, as the letter is covering about 75% of the page. This letter will be on an 8 1/2 - 11 in' paper. If you can show me a sample that would be great as I often choose those who show me samples whenever I've a project. My budget for this project is $30.