I'm sure you can find a surgeon to do the surgery if you look hard enough. Surgeons are people too and they have complete control over their practices.
I will say, be very careful not to do unnecessary surgery. Liver toxicity can be confused with gallbladder issues and many doctors can't tell the difference. A lot of specific blood work has to be done. but it can be a simple fix. My 65 year old sister was told by THREE surgeons to remove hers and when blood work was done by a ND, she was relieved to find out a liver detox would take care of everything...including the pain. That was 10 years ago and healthier than she's ever been.
Surgeons also don't tell you that if you are over 65 that anesthesia can throw you right into full fledged dementia. Your uncle already being autistic could really create terrible consequences there. Most of the time the dementia is permanent if you don't know how to prepare before and detox after.
Non-Alcoholic Cirrosis of the liver (NACL) is very common these days because of the chemicals in our food supply. It is actually more common now than an alcoholic's Cirrhosis of the liver. A gallbladder is a very necessary organ and IF it can be saved, I would recommend that route.
Just my two cents for what it's worth!