Yes, Swift sells Sport and Spec-R for the '04-'07 WRX.

2004-2007 Subaru Impreza WRX Sedan Sport Spring Specs:
Front Spring Rate – 190 lbs/inch
Rear Spring Rate – 84-151 lbs/inch
Front Drop – 1.0″
Rear Drop – 0.8″

The Spec-R springs have less drop at 20 mm fr/15mm r - and I agree the reduced drop is better - but I'm concerned they are too much spring for my daily driver. The Swift Sport don't seem to be enough spring to switch from the stock WRX.

Spec-R springs and these Tanabe GF210 springs would need an STi-strength strut or better.