So why not ask help from Angel?
You'd think then that Buffy would ask Angel and company to help her spread the word out that there are vampires who side with the Slayers and that not all Slayers are evil and not all vampires are good.
Angel and Buffy aren't on THAT bad terms, are they? Regardless of their past, Angel would gladly send his team and his allies (heck, he has a few real life ANGELS from heaven as acquaintances) to assist Buffy.