Image design for a tshirt

I'm looking to have a t-shirt image designed consisting of two pictures split horizontally. The first picture would be a revolutionary war soldier sitting on a horse facing away (riding away from the viewer) on a dirt road in a forest with a musket slung over his back. The second picture would be a biker on a Harley style motorcycle facing the same way on the same road but in this one the road is a paved road with a modern style AR-15 rifle slung over his back. The background/setting of both pictures would be exactly the same except for one being a dirt road with revolutionary war soldier on horse and the other would be paved road with biker on motorcycle. I've included a few images for reference. The file titled Setting is the setting I want for the picture with the only difference being a dirt road instead of paved for the revolutionary war soldier. I have included a picture with a revolutionary war soldier for reference. The image will just be from behind the revolutionary war soldier on the horse but the uniform in the image should be a good reference. I also included a picture of a biker for reference. The picture will be from behind like that but I want it strait on from behind and without a logo on the bikers back. Just a black vest like that and same style motorcycle. And then of course each image will have a musket or AR-15 style rifle slung across their backs as mentioned above. I can provide images for reference to those as well if needed. Please let me know if you have any questions.