Lowrance Depth Finder LSM-2 Info??

[Cruzer1800]

I have a 1996 Chris Craft that came with a Lowrance LSM-2 depth finder system in it. Having trouble with it and trying to find anything online about it... according to the internet, the Lowrance LSM-2 that I have in my hand never existed!? I am finding NOTHING on it... anyone have anyplace I can get info/parts/etc???
Thank you!