First let me clarify something, there are no electives for IMGs, and since you are gonna start your internship, that means you are still a student not an IMG.
I will give you a small list about places that offer electives, and you can find out on their websites whether or not they require either TOEFL, Step 1 or any other requirements like being top of your class ( @UTHSCSA !! ), malpractice liability insurance/health insurance, having a sponsor there or having an affiliation with your school !! :
For starters, always Mayo/Cleveland clinics
SUNY downstate
Quillen @ east tennessee univ
VCU
Univ. of Alabama ( requires a sponsor there )
Tulane
Good luck