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.
But, I don't specifically mean my own Marketing Plan S6PEC Framework because there are so many versions and gurus out there that can give you the benefit of marketing plan. Of course I am going to say mine is a lot better because it's a practical and practitioner's guide. Other than being a consultant, I also have performed marketing manager role, entrepreneur role, business manager role, investor and student of entrepreneurship (during my MBA!). But that's not my main point. My main point is for you to have a marketing plan to guide your business. Which one? Well it is up to you!