This case does the job,
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This review is from: HDE 5.2 inch Hard Case GPS Case for TomTom and Garmin (Black) (Electronics)
This case fits the Garmin 5" perfectly. I holds the charge cord in a nice netted area so it doesn't hit against the unit itself. It also doesn't take up too much space so it fits in the center console of my Kia Optima as expected.