As stated LARS is something you do to deconflict your intrests with ac transiting the area. Mil airfields provide it because they dont have CAS around them and therefore it suits their purposes to know who you are and what your doing. Lossie and Leuchars are the only official LARS units in Scotland but Aberdeen have been known to work purely LARS traffic if it suits. With the removal of West Freugh from the LARS chain there is a gap in coverage in SW Scotland but as for the west coast, beyond the central belt, there is not an overwhelming demand. Scot Mil or Civil may be able to provide you with a sevice depending on your level but most of the low level enviroment is taken up by the HRA. Again no one sets themselves up in buisness to provide LARS and unless an airport magiced its way on to the West coast and bought itself a radar and then considered itself a charity, I don't imagine LARS will ever be available up there.