Have you seen the
Job Accommodation Network site yet?
It is not specifically geared toward university faculty/staff, but it is geared toward working adults more generally, and has many examples of accommodations for invisible disabilities for a variety of job descriptions (including academic jobs, and jobs with similar demands, tasks, and environments). They also will consult with you regarding accommodations and approaching the topic with your employer, and they are familiar with differences in rules/regulations covering state employees and private employees (depending on your institution). The search features of the site aren't great, but if you poke around you may find something useful.
If you are in a STEM (science, technology, engineering, and math) field (and in this case, some social scientists as well), the
AAAS EntryPoint program may be able to point you in the direction of useful resources. Although their primary focus is internships for undergrad and grad students with disabilities, they have active mentorship programs. They also publish a directory of scientists and engineers with disabilities, so you may be able to use that to find someone in your field and/or with a similar disability who could give advice.
In psychology, the
APA has an active program focusing on inclusion of researchers with disabilities, and they are also starting a mentorship program.
There are also a number of disability studies programs around the country, most of which have some faculty with disabilities, often in the social sciences, humanities, law, architecture/urban planning, etc. Though the faculty with disabilities may be skewed a bit more towards those with apparent disabilities, you might be able to get some suggestions there from disability-friendly faculty members.
Best of luck!