I would recommend you call:
(323) 302-4774 if he can't help you, he can point you in the right direction.
Good luck and tell him I said hello.
Odds are, you will get the "Right To Sue" letters from both EEOC and DFEH ... just because those agencies take the claims with issues they find 'sexy' and workers unable to return to the job after a work injury confuses those agencies. But, in a nutshell, you wait for those agencies to tell you the government will NOT be prosecuting any claim on your behalf, giving you the 'right to sue' and you look for counsel well-versed in Americans With Disabilities Act (ADA) violations... check with the LA Bar Association for a referral for an ADA specialist.
IF YOUR PROOF is a clear as you state here, any ADA Lawyer should be super excited to take you on a contingency basis ... if the 'accomodation' you need is reasonable, and the employer just refused to make a reasonable effort and had a position it could reasonable accomodate for you, an ADA lawyer will be happy to see you.