Cam is dipping a grilled cheese sandwich into a bowl of tomato soup when he feels the summons. He goes ahead and grabs it. Doesn't even drop the sandwich.
"I'm not actually sure I want to remove your extremities in front of witnesses."
"Doing anything along the lines of 'stopping the bleeding' will tend to make it harder for me to attach a new finger that doesn't have a layer of blood clot in the middle of it, it's really pretty inconvenient, I'd rather just talk to the NIH, I was speculating idly about how to get people to believe that I have awesome cures and treatments to share if I can't get a hearing in some more civilized way what with lacking a legal existence. By the way, after we eat I want to borrow your internet again, look for my parents, see if I can pretend to be my twelve-year-old self to people who aren't paying attention or something."
"Oh, you didn't do that last night? Sure. Also, it's not like I'm not used to periodically losing blood, I'm sleeping with a vampire. My thought would be that once it's been established that you can replace bits, a professor would be better than me at getting you in contact with the NIH and/or amputees."
"You haven't seen me replace bits. I could show a professor other things I can make and they might be as convinced as you."
Breakfast is yummy. The Internet turns up no public information about either of Cam's parents in the places they are meant to be. Professor Marsh?
Cam entertains himself with his computer during the interim. "Hello!" he says, when they have professorial attention.
"This is a matter-conjuring demon from another dimension. He wants you to introduce him to someone from a government medical agency, or introduce him to someone who can introduce him etcetera, so he can make new limbs for amputees. Real limbs, not prosthetic ones."
"Ah," the professor says. "I expect a demonstration is called for?"
"The limbs for amputees doesn't scale I only mentioned it because it was flashy I'd have to do it personally every time the real winners in my arsenal are the vaccines and fancy medical scanners and drugs," says Cam in a long sigh.
"I can make it with that model name alone but I can make a better guess about where a reasonable place to put it might be if you give me its approximate dimensions. Or point at an appropriate flat surface."
"Although I can do that too! In my world daeva have been a known thing since 2005 and having demons - more importantly, angels - accessible may have slowed our medical progress a bit; some things you have now are still useful even from my perspective."