Is there an open source insulin pump out there? That seems like it would help the sustainability of this project. I just texted my older brother to see if he h

Is there an open source insulin pump out there? That seems like it would help the sustainability of this project. I just texted my older brother to see if he had any of his old insulin pump models. I'd love to build him one since he only has a few years of life left since he's terrible at managing his own sugar levels.