Waste Less works has a pile of r11 foil faced insulation spaced for 24 inch on center framing. Most of them are about 4 foot chunks. Approximately 500 square feet (ish). It's currently inside under cover. All of it for $75 if you come get it from the Trempers shopping center, old Snap office.

r11 Foil Faced Insulation

$75.00Price