Has anyone had their GPS repaired by anyone other than Garmin? I have a second Garmin (a nuvi) that I use in the car, and it is now unable to see Satellites. Constantly acquiring Satellites. A quick search on the web shows a couple of people doing repairs. Has anyone got any experience of them, or can they recommend someone? Ideally I'd like someone in the South East ish. It's a few years old now, and doesn't get much use, so I don't want to spend a fortune.