I just bought a pair from an inmate a couple of weeks ago. These should work perfect for that temp range as long as your talking Fahrenheit. I live at 8500 feet in Colorado; I went for a ride a few days ago when it was 20 degrees. I wore smart wool long underwear, a tshirt, and a insulated riding jacket, and was fine. Try them on with some light fleece first.
Klim is having a sale right now; 119.00 on their website.