>>2822977
Aegismax - Dusk
Naturehike - CW400
Iceflame - Autumn quilt
Flames Creed - Quilt

The cheapest option would be the Flames creed quilt. I have one and it's great. I got the Large version. It's so comfy and roomy. You can zip up the foot box and clip the back together to make it into a sleeping bag. I have taken it down to 1C wearing just base layers. $100USD+gst for a quilt hard to beat.

There is also the Ice Flame version where they sewed some pad strap loops for an extra $20