She is going to have Excimer laser treatment, it isn’t that widely available but there have been studies that show that it is effective. Here is some info:
Vitiligo - & the XTRAC Excimer Laser
Narrow-Band UVB phototherapy is a a cheaper treatment that also works in many cases (not well at all tho on hands or feet) , u might want to check that out as well:
http://www.docguide.com/news/content.nsf/news/852571020057CCF6852573100077B93A