attempt to retrieve records from what was Sisters hospital

I AM TRYING TO LOCATE RECORDS FROM 1977 WHEN I WAS DIAGNOSED BY A MYLOGRAM BY A DR. NELSON ESCOBAR, NEUROLOGIST. WHEN MY SYMPTOMS CAME ON WE WERE GOING TO TAKE ME TO MAYO CLINIC AND UPON THERE ADVISE, SSAID WE HAD THE BEST NEUROLOGIST IN THE MIDWEST IN SST. JOSEPH. MY MOTHER HAS TRIED TO LOCATE HIS TEST RESULTS AND DIAGNOSIS BUT CAN NOT FIND HIM OR HIS RECORDS. THEY ARE VERY IMPORTANT AS I AM PREPARING FOR A CASE TO OBTAIN DISABILITY BENEFITS. HE ALSO DID A SPINAL ON ME. COULD YOU HELP IN ANY WAY? ARE THERE ANY MEDICAL STORAGE FACILITIES I CAN CONTACT? ANY INFORMATION WOULD BE VERY HELPFUL. THANK YOU.