OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Gwerthusiad o Gynllun Peilot Paneli Cefnogi Ailsefydlu'r BCI by Liz Phillips. Published by Ymchwil Cymdeithasol Llywodraeth Cymru in 2012. Publication and catalogue information, links to buy online and reader comments.