I once had a similar problem with a large wall mural in my living room, where I wanted to perfectly adapt a nature photograph to certain architectural features. I quickly reached the limits of stock photos because details like sloping ceilings, windows, or specific "empty" areas for electrical outlets couldn't be taken into account. In the end, I had a suitable subject photographed in high resolution and then digitally edited it until everything looked right. That was fun, but also a lot of work.