Sumi, the Women's GoLite Adrenaline 40°F is a discontinued bag, but you may be able to find one used or new on the forums, ebay etc. Excellent excellent bag that never got the attention it deserved. It was conservatively rated given that it weighed 19 oz with 10.4 oz of 800fp down fill. Sewn through baffles (if it were fully baffled, I suspect this would have been a 30-35 degree bag). They came in 2 sizes...the smallest was only meant for users up to 5'5" but I still fit in it even though I'm 5'9"
Around 2010, golite rebranded their sleeping bags and switched to recycled fabrics. The Women's Golite Adrenaline 40F became the Golite Women's 1-season, and gained 2 ounces due to the recycled fabric's increased weight. This place still has em in stock apparently: http://www.cyclocamping.com/Sleeping_Bags/golite_adrenaline_1season_sleeping_bag_women_reg/260005110-75.aspx
Seems like an okay deal...but I would try to find the original adrenaline bag maybe.