If the driver is ruined, and the sub useless as-is, why not see what it would take to remove the existing driver? If the mounting and connections turn out to be something you think you can reasonably handle, ask Sunfire if you might purchase the driver and do the replacement yourself. If the part is too expensive that way, put a wanted ad on audiogon or elsewhere on the ‘net for a Super Jr. where the electronics may have been ruined but the driver is still good.
If an economical repair of the Super Jr. seems out of the question, then using the $350 toward an Outlaw alternative is a good way to go.