So, the doll has been listed nude on ebay, with detailed pics:https://www.ebay.com/itm/206007465023?mkevt=1&mkpid=2&emsid=e90001.m163700.l177165&plmtId=111236260102&mesgId=3080&mkcid=8&osub=6f784f55ad91f4a2b691a7778879e06e%257ETE210001_T_Normal&segname=TE210001_T_Normal&crd=20260120101000&ch=osgood&bu=43192506643&trkId=1fd4d4d4-9c77-363d-8a3f-68fdd75ebba5&cnvId=eeaf8930-3192-4374-8e08-b404f29ad941&recoId=206007465023&recoPos=20

As stated before, she is a perfect color match for the Barbie made to move Volleyball Player, and the neck hole is the right size once you cut down the green spike on Barbie's neckpiece, easy-peasy. Using that doll as a guide, you can also find her a straight-arm and-leggged body, too. Not sure about Model Muse, she's VERY peachy. I recommend just buying the nrfb complete doll from www.atomiclabtoys.com, since you're getting the nude plus extra hands/feet, complete outfit and accessories, and the bonus head (one has blue eyes, one has brown) for the same price as the ebay one I linked. Just a nifty piece of pop culture, and a very pretty doll(s). Enjoy!