Switch should be easy enough to replace, and won't cost that much.
It's the same control box used on various chinese lathes, and I'm pretty sure the switch is a standard size.

A quick search for a DPDT rocker switch threw up this on ebay - 6P DPDT Rocker Switch on-on 16A 250V 2 Circuits 2 Positions 6.3mm Terminals | eBay
Just check the dimensions of the panel cut-out are correct, and the rubber boot should swap across.