Hi in the UK there plenty of genuine Isuzu pad sets on fleabay at the moment - you can use any of the following - trooper 97> , Frontera 98 > they are about the only UK versions that will fit
the genuine ones come with new anti rattle shims and grease - the vauxhall ones are after market unless you get the expensive ones
Oh yes and Monterey ones fit too
Best thing is to get in touch via pm or email - i'll let you have the full x ref
cheers
Steve