I would suggest you spend $30 and purchase a CD with thousands of Legal Contracts just as you describe already written form a place like
www.Staples.com or the like.
You can then easily modify one to meet your particular requirements and verbiage.
One of the nice features in these CD's is an ehaustive "Reference" section that offers explanations and background to each of the items and contents presented, so you can understand what you are looking at as you make "edits" you are compelled to make.
* The "Help" sections are not intended to be in any way a substitute for legal counsel, however. and on we go....