Need advice on what unit to replace an Lowrance X-65. The problem is the old unit is an in-dash unit. It fits in between the tach and speedometer. There is absolutely no room on either side of the unit. The new units like the LMS 480 or Eagle equivalent is too large. The only units that I have found to fit is the 300 series of Hummingbirds or possibly the Garmin line. The Lowrance people that I called were not able to help me. Any advice or suggestions.

PS I don't want to drill or mount on the side.

Thanks,
Good Fishing