Help Scanspeak 18W/8531 Needs Repair

I have a Scanspeak 18W/8531 driver that wasn't producing any sound due to a broken solder joint. The reason is the negative terminal/speaker clip was broken off and the person who built the speaker apparently just soldered the copper foil to the wire above where the terminal/speaker clip should be. Where can I send this driver to have a proper terminal attached so it can have a proper soldered connection?