DXF-AAMA is a very specific file format by American Apparel Manufacturers.  While DXF is the most commonly used file format for CAD drawings, the AAMA specificity isn't a very common exchange format for 3D data, and isn't widely supported by any 3D applications I can think of offhand.  The only free 3D software resource I can think of where you may have a chance to find a "plugin" extention for this format is Blender, but I actually doubt it.

Optitex.com has software and online services that can import and export this format, but it's not free.  If you have no other choice, then maybe check out their services.

______________________________________

My Store
My Free Models
My Video Tutorials
My CG Animations
Instagram: @luxxeon3d
Facebook: https://www.facebook.com/luxxeon