One thing about my business, I don't sell templates. I only sell REAL content. I believe that template is only to give you the general overview of direction but not how_to do it. That's why I highly not recommended you choose to download or purchase marketing templates because I have seen them i personally think it won't help you much. Let me share you a recent story about template.
Now the question arise; how to create an effective marketing plan for a company? We all know the format of a marketing plan. Whether you make a formal or informal proposal, a plan should be such which touches all the essential points to deliver the targeted goal.