Create 3 New eBook Covers for Historical Novel Trilogy

I have 3 historical fiction books about ancient China selling now on Amazon: [login to view URL] [login to view URL] [login to view URL] I made these covers myself. I pulled the images off some sites without permission. I'd like to make 3 new covers for these books about ancient China's Warring States Period. The books need to have a similar title and author typography that makes it clear to readers that these 3 books are part of a series. The images need to have similar effects, such as shading or positioning, again so that readers know the books are part of a series. I'm including the 3 original cover images for reference. The pictures on the new covers will have to have something to do with ancient China, around 500 BC. You'll probably have to work with some stock photos from one of the photo selling sites. Remember, all three photos/images will have to have a similar theme about China so readers know they're part of a series. I'll pay by invoice for my own tax purposes. Good luck.