Garmin 2620 map loading error solution

Howdy all -

My newly inherited 2620 has started in with the Map Loading Error. I
have read all the posts regarding this, and have tried to copy the .img
files to my PC. It get's about 1/2 way through before erroring out on
a data error. The original disk that came with the unit has been lost
long ago. Is there a place to get a new .img file, or can I request
it from the manufacturer. Also, is this a problem with the CF card, or
does this just happen periodically when you try to mount a spinning
hard drive to a vibrating land cruiser.

My hope is that I can re-format the CF card, and re-install the files
without having to return to the manufacturer. Am I high?

Thanks.
Chris.