I don’t think anyone has an extra copy. Its quite expensive for
a small book; costs HK$100 (about S$25). Why not you try asking at
the ComfortDelgro HQ (located at Braddell Rd). The last time I
heard is that they do sell the book there. The book features
SBS buses that were operating in 1995-96.
There are pictures, a brief history and technical details for each
particular model as well as a nostalgic section featuring buses
that have been withdrawn.