It is possible that you have a claim under the ADA or Section 504. Asperger's is being eliminated as a stand-alone diagnosis in the new DSM and is being folded into Autistic Spectrum. You may require a revised and updated diagnosis to reflect this.
Ultimately, this is a fact-specific question. I do not believe that your school can fall back on a policy to not provide individualized accommodations because under ADA/Section 504, private and public universities must reasonably modify policies themselves to provide access. However, the reason why all of this becomes fact-specific is that institutions of higher learning are required only to provide REASONABLE accommodations to students with disabilities. You should call a lawyer experienced in education/disabilities law to discuss the specifics of your case. You'll need to let him/her know what you believe your particular needs are and what your school is and is not willing to do. You may need a more helpful letter from your physician that identifies your individual needs more concretely. Good luck!
This is intended for general informational purposes only and does not constitute legal advice or create an attorney-client relationship.
I concur with the answer already posted concerning the fact specificity of the reasonableness standard. You cannot assume (and I am not implying you are) that your university is offering accommodations that are anything other than the "floor" meaning, the minimum that disability services believes is adequate to comply with governing federal laws. Standard interventions are likely more cost effective to administer than individualized accommodations.
If you cannot find somebody who will advocate for individualized accommodations in disability services, then try to gather as much supporting data as possible from a professional who is qualified to administer tests which hopefully will provide the evaluative data to establish that your request for course specific accommodations is reasonableness. Obtaining individualized accommodations for university level courses can be frustrating. However, it is hard for disability services to ignore empirical data so I would urge consultation with another psychologist or other qualified specialist who can make the case for individualized accommodations.
This answer is provided as a mere courtesy and is not intended to provide legal advise but rather a general roadmap which may assist in deterring whether or not to seek legal advise from a law office in your locale.. In some cases the answers may not be jurisdiction specific. In no event, is an attorney-client relationship formed by providing answers to posted questions.