How long before I can have new butt implants after the old ones are removed? (photos)

I had butt implants put on the outside of the muscles. As you can see they are becoming deformed moving around and not in place anymore. I’m planning on having them removed completely and replaced with new ones behind the muscles. What type of Implants are the best on the market now? There will be a butt lift included as you see there was one previously done that’s why the implants was placed outside of the muscles I was his first butt Implant patient.