Ended up doing another quick, at least compared to all the Monsters I used to do, reroot. Beauty Secrets Barbie was somehow the only one I got ca 1980 that wasn't stolen from me because I wasn't gaslighted enough at home (did recover her girlfriend and several other parts 20-odd years later) but she got the love to prove it. Having mobile arms had to be a big part of it. Press a button on her back and she shrugs.
Anyway her hair has been a crispy mess forever and this gives her back her original color. It's from dress up headbands they sell at the Dollar Tree (always get two just to be sure). She'll get a trim and bangs after its been trained.
And thus explains why I don't like to share anything I ever expect to see again.