Article Spinning/ Rewriting Perfect English Only

I have 2 article which are around 500 words each, I need them spun to be 30-40% unique. These 2 articles need to be spun 12 times each. One is about brand design, the other advertising design. So I need to be sent article about brand design 12x, and article about advertising 12x. Should not take too long with a program with the best spinner. Just 2x 500 word articles with at least 30-40% unique. Only half of each article needs to be perfect english, the other half can be a little hit or miss, I'll make clear which parts when I send you the articles. Your english must be perfect, so being your first language would be a strong advantage. Please do not bid unless if your english isn't up to scratch. You're wasting your time and mine.