In article ,
says...
Can anyone recommend a good place to supply and fit an aftermarket
Satnav system to my new car?

Don't know about how good they are but.

http://www.falcon-security.com/cgi-b...?product=cat14

They tend to do a lot of work arround Warrington where they are based.

and also do alarms to protect your new investment.
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The poster formerly known as Skodapilot.
http://www.bouncing-czechs.com