If the battery is not charging from either shore power or the TV, then I would not be to quick to blame the battery charger. Does your 560 have the battery isolator option? If so, the electrical schematic shows a 50A breaker between the charger/TV power and the battery. I would check that first to see if it is thrown.
Also check that the GFI outlet is not tripped - I believe this feeds the charger. there is a charging troubleshooting flowchart in the manual that would be good to go through.
What is the current voltage of the battery? Your battery may be bad as well and I would confirm that before replacing the charger. If you do need a replacement charger, then Camp-Inn sells them.