Ok.. leme save ya some time. I've been looking for the same thing, cept looking for a map of Colombia. I keep hearing, no it's not available.. or make your own...ect. A bunch of negativity for something that should be real simple. Here's what ya do..
Go here: http://tech.groups.yahoo.com/group/mapcrea...are/lcmBuilder/
Get this: lcmMapEdit087a.zip
That will allow you to convert Garmin format to Lowrance format. There's a bunch of Garman maps out there, here's a public site:
http://mapcenter2.cgpsmapper.com/
or better yet:
http://www.mininova.org/search/?search=garmin
(use that one to replace your CD's that are too damaged to be readable)
That should make it a little easier for you.
Enjoy!