Oban
The chances of getting the kit in a islander for a SBAS approach is rather an expensive issue.
They might be able to get a drop into the circuit off shore.
I have a sneaky feeling that there has been a shall we say less than VFR approach for years which was used by the ambulance flights which was company only approved.
I really don't think though it would comply with any public transport rules. But then again there is some weird and wonderfull approaches in Norway, Vargar and Iceland.
The other two wouldn't be to bad.
But to be honest to get these approaches to work you would have to get runway lighting which 1.3 million isn't anywhere near enough.