I'd like to confirm the worst fears of everyone who rebodies heads to give them full articulation: The Fashionista Ken with Vitiligo's best match is King Ocean Ken : r/Barbie
Ken Barbie Doll African American Male Rooted Hair 1968 Mattel Body 1991-97 Head | eBay
Amazon.com: Barbie Signature Ken 60th Anniversary Vintage Doll Reproduction (12-inch) with Silkstone Body and Wrist Tag, for the Adult Collector : Toys & Games
Update: Here is my tutorial for putting a Ken head on a Barbie body : r/ Barbie
Vintage Barbie Doll & Ken Doll Bodies 1966 1968 Ken Head 1966 (Lot of 2) | eBay
Barbie's beau Ken gets 'Dad bod,' hipster makeovers from shopping site Lyst