for those of you who don't like blender, or don't know how to use blender, you are fortunate, since magic has been invented.
I swapped both nyotengu c1 and marie c1 with each other, and they both have their proper proportions. I did absolutely nothing but drag and drop the files in a tool, and it did all that for me.
the only issue I see so far is with marie costumes. since she has no breast, the tool gives breasts to the costume when given to another character, but the clothes are wedged between the cleavage (maybe some of you like that) well that's an easy fix in blender, but if you don't know how to use blender, then an update might fix this since this tool is still beta.
the ABC transformer tool by riry sukisuki.
https://www.mediafire.com/folder/f2d5z16fv0xm2/DOA5LR
Pass: doa5lr
instructions are simple, drag tmc into tool, choose the character your giving it to, then click transform.
if the bones of the characters are different, like in my example, then you need bone tool as well
http://www.mediafire.com/download/xajsew7fofq9cbh/TMC Bone Tool 0.5.0.zip
just drag the tmc into the bone tool. then drag any tmc of the character your giving it to into the tool. check on both change bone and collision. then save.