I am so glad to have you to confer with!

I too am from Illinois and once again I just called my State Farm Agent about the loss of use rider... as I expected she knew nothing about it. When I told her that I would then have to contact the Home Office and talk directly with them boy did her tune change. As I type she is working on getting me some answers and will call me back! Finally I am perhaps to the bottom of this?
But I did want to share this with you perhaps it will help you... and definitely call to confirm this with your agent and don't go off of mine alone as they are obviously not aware of all the ins and outs. But according to that newsletter they send out it specifically states " Each car policy you have with State Farm extends coverage for up to 21 consecutive days of rental". When I questioned her on the phone she said that if I have two different car policies I would be eligible for up to 42 days of rental insurance! So if you own multiple cars and are insured through State Farm on them then your 37 day rental should be no problem! I'll have to keep you posted as to what she is finally able to dig up for me.
It makes me a bit worried when she kept using phrases like "if you are really that worried I can look into it", what are you talking about loss of use?"... I do not think I will except anything she has to say unless she can prove it to me in writing.