FT: Western Mountaineering Apache 15 down bag

I have a Western Mountaineering sleeping bag in good condition. It's the Apache model, rated to 15 degrees, 6 foot length and right zipper, weighing in at 2 pounds. It's seen around 60 nights total. I would like to trade this bag for a warmer bag for winter pursuits such as the WM Kodiak or Lynx or a Feathered Friends Snow Bunting or Widgeon. Maybe somebody has a winter bag laying around they never use? Please let me know what you have.