I think one way to reach your objective is to directly search on the web site of specific universities or hospitals by name (according to your preference). Many of the university hospitals already have a visiting medical student elective program. You can search their website for your preferred elective schedule and its eligibility.
You may find an application form or an email address or contact information for applying or asking specific information you may need.
Hope you find this useful.
This answer does not substitute for direct medical consultation.
Dr. Safaa Mahmoud.
MB BCh, MSc Internal Medicine. MD Medical Oncology.
PhD Experimental Medicine and Biochemical Science.