It does not look like VZW has provided a software installation process for this model. You will need to bring the device into a VZW store. The other option is to work with a support rep on replacing it with a version of 8800L with the current firmware already installed.
Firmware related problems generally are supported even when the device is not. It is worth a call/chat/visit with a VZW rep to see what the options are before you consider replacing the device.