Are there disabled Holocaust survivors? Yes and no.

The disabled were not sent to camps, they were gassed in "hospitals" specifically outfitted for the purpose with gas chambers. Therefore, either you were gassed or you were not. There were many disabled Germans and Austrians (the "euthanasia" of the disabled was a policy in Germany and annexed Austria exclusively) who were not gassed. You could call them survivors, only they were never in any camp or otherwise oppressed and lived their lives as they had done before. They just weren't selected for "euthanasia". There were criteria to be met, mainly boiling down to "being a burden on the state". Also, the killing of the disabled was officially halted in late 1941, after church protests, though some of it went on clandestinely after that.