Looks like the exact item we got is sold out on Amazon at the moment, but it was about $150 for a 1000 square foot roll.
amazonRadiantGUARD XTREME Radiant Barrier INDUSTRIAL Grade 1000 sq ft roll | 48-inch by 250-feet | X-1000-B | Perforated Breathable Metalized Attic Foil House Wrap Reflective Insulation – BLOCKs 95% of Heat - Weatherproofing Window Insulation Kits - Amazon.com
https://www.amazon.com/dp/B000P4YOM6/ref=nosim?tag=cougarboard07-20[https://www.amazon.com/dp/B000P4YOM6/ref=cm_sw_r_cp_apa_i_qOnaFbJ41KXHR]