Need advice on replacing console mounted fishfinder

[joey]

Here is a pic of my problem. I just purchased a "new" 1997 hydrasports bass boat. There is a recessed portion in the dash for this nonfunctioning lowrance to fit just perfect. I assume it came this way from the manufacturer. I would like to replace this with something that actually works. The dimensions of the hole is exactly 5" x 5". As you can probably see I can't make the hole any larger.

Any ideas?

[SeaRay]

Check the specs on some of the DF by HB and Lowrance. Some of the small screen ones (3.5") may fit it the hole. My friend has a 97 Stratos with the same setup. I think it still has the original unit in it, but it is a GPS combo and it still works.
SeaRay

[joey]

Thanks SeaRay, that might just work...I just dont know how to "fill" in the extra space if I find a fishfinder that is smaller than 5 x 5.

[lowe rider]

Check out the NAVMAN units that come on the newer Lowe boats. My cousin bought a 2007 Lowe that has one that looks to be the same size.