Yes, same book, very dilapidated state, in the local auction room in Hawick. I also have relations in it but had to use the local library's copy to get the info. Nice as it has photos too of some of the deceased.
I do have a copy of the HMSO: Soldiers died in the Great War 1914-1919, Part 30 - The King's Own Scottish Borderers. Not so easy to use as it is arranged by Battalion and covers the whole lot which might be useful to anyone who is sure their ancestor was in the KOSB when he died.
Enid