Are you interested in quilts or just bags?

Ray Jardine sells quilt kits though they are synthetic insulation. http://www.rayjardine.com/ray-way/Quilt-Kit/index.htm

There seems to be so many different sizes of bags available on the mass market that people find it is not worth it to make the bag. Plus, if you don't have a system, dealing with down can be quite messy.

I think someone on here made a bag for her grandchild. There should be a thread in the hiking with kids forum or the MYOG forum.

Also, Tim at Enlightened Equipment will customize a quilt to your specs for a little up charge. He also has a ton of sizes available. You might not even need customization. I think a short/wide quilt would fit you perfectly. http://www.enlightenedequipment.com/ The Enigma short fits up to 5'4". The wide fits me and I am more than a little husky.