I can't seem to find any coilovers for the 2012+ Spark, coilovers from other Chevy's might work, Chevy Cruze Coilovers or even Sonic Coilovers. So far I found lowering springs from B&G...
When you think of upgrading your Chevy suspension and lowering your vehicle, you probably have some of the same priorities in mind that B&G Suspension does. B&G Sport Lowering Springs for Chevy are engineered to improve handling while maintaining safety and ride quality. B&G Sport Lowering Springs for Chevy also will give your vehicle an aggressive look.
B&G Lowering Springs for Chevy have all of the features that you're looking for: First, B&G Chevy Lowering Springs feature progressive spring rates. This means that they have multiple spring rates to maintain a quality ride while significantly improving handling, cornering, and providing an aggressive vehicle stance. To top it off, B&G Suspension is so confident in the superior quality of their Chevy lowering springs and suspension products that they offer a lifetime warranty on them.
The part number for this item is: 12.1.014 and it fits: 2012-2013 Chevy Spark models.
This set of 4 springs will lower your vehicle by 1.4" in the front and 1.0" in the rear.
B&G Lowering Springs and Suspension for Chevrolet - B&G Lowering Springs 2012-2013 Chevy Spark