Hi, @felicia There is no such script. The only thing you can do is pass the aniblock to frames in the timeline, export it as fbx and do a retarget either with 3DXchange (Converted to rlMoltion...) or in Autodesk MotionBuilder. A bvh can also be useful for both tools, or Webanimate, etc. I do not recommend Blender, which is quite peculiar for exporting.
If you want, I can convert them for you... More or less, I dedicate myself to MoBu in my spare time. Give me a link and I'll convert them...(Don't send me 500 Gb! 😀 )