Well, today I took your advise, dug out some white/grey Karakul (Sheep) hair and made a wig for my troll. This is a very time consuming process, but well worth the effort. And I have to say that I do like her much, much better with this hair than the other darker color. So now I need to let her sit, so that the wig can dry to the shape of her head.
When it's completely dry I will permanently glue it to the head. Chores need to be done, so I'm off this here machine.