This isn't exactly local, but when I lived in Edinburgh briefly a few years ago I used Car Craft in Broxburn to service my Prisma. I got to know the owner via various car shows and he also owned an integrale Evo 1 at the time. A lot of the other LMC members in the area used him as well:
https://carcraftbroxburn.co.uk/Also, if you use Facebook, there is a 'Lancia Scotland' group that might be able to offer advice on somewhere nearer to you:
https://www.facebook.com/groups/662867244199242