Hi and welcome to disABILITIES
I am not disabled (my DD is), but I have some basic information about jobsite accomidation. There are some posters who are much more informed about that than I am though and should be able to help you out.
In general, workplaces are afraid of ADA accomidation because when they hear it, they think $$$$. In actual fact though, most accommidations have very little or no net cost. And, usually when comparing the cost of accomidations to the cost of replacing a worker, the accomidations are a lot less expensive.
A little more information about the type of accomidations you are looking for might be helpful though.
Do you know what accomidations you need or are you at the point of knowing you need something, but not what?
Is it architectural (like do you need some changes to the building), would it affect how your job is done, when you work, do you need some extra tools or aids???
Also, besides the worksite ADA person, are you working with anyone else, like Vocational Rehab or anyone?