TRW CS5606 are heavy duty front replacements. Napa, Advance, Parts America, etc.. all carry it. I think I paid like $65 for mine.
I've never seen ATR springs up close, but they look like regular cargo springs (TRW/Moog CC627) from the picture.
If you've taken out your A/C, or done significant weight loss work to the front of the car, the new springs might cause the car to sit a bit high.
My new springs helped raise the car about a full 1/2 inch or so in the front, but when I first put them in, it was more like 3/4 inch until they settled.
Once you get yours done, you might want to get your car aligned, or at least have the alignment checked.
Billy
Montgomery Village, MD