Gaytronix - Build your own white label gay tube site.
HentaiBiz - Build your own white label hentai tube site.
JuggCash - Build your own specific pornstar tubes or custom tube landing pages.
PimpBoss - Build your own white label tube site.
PimpRoll - HostedTube sites as you mentioned.
As I find them I will be adding more to my
white label sponsors page.