Blob STi broken spring

[Shaqs77]

Hi guys. Need some advice. Car has a broken front driver side suspension spring. Car still has original suspension setup. 
 

want to keep it original as possible so coilovers is a no go. 
 

what should I replace the front spring with? Replace fronts with genuine Subaru or go aftermarket?

[Shaqs77]

[Tidgy]

Try import car parts, should be able to supply oem springs, other option is a set of lowering springs.