Trying to find a book about stolen fossils, reanimation, and robot dinosaurs

I read a book a long time ago that I absolutely adored. Sadly I don’t own the book and can’t remember what it was called. I do remember some details though:

1. The book takes place in the 1800s

2. Dinosaur fossils have been stolen from a museum but nobody knows what happened

3. The fossils are smuggled by surgically replacing the femur of a man with one. The man is put into a kind of exoskeletal suit to keep him alive.

4. There is a scene where the main character is faced down by a robotic tyrannosaur. They describe the hot oil dripping from its mouth like saliva.

5. The book either takes place in England or America

6. The book is at least eleven years old

7. The book is a novel, with no pictures