Many years ago I wanted to change my struts, but it seems impossible to get oem. Moreover, doing DD on trying to find struts in the aftermarket realm gave me a headache.
Since my ride still runs close to perfect, I decided to keep my oem now going on 13 years.
I don't know why it's so hard to find new oem, but if I ever needed some struts, I would probably go to a Pick & Pull and grab some oem struts. Or if I'm desperate, used ones ebay.
But for rear springs, definitely go kyb. Personally never had a problem with them since changing them many moons ago.
I really don't want to take a chance with some crappy aftermarket quick struts, yah.... yah, cheaper, easier, ready to install, but I heard people online say they vibrate or drive horribly.
So for now I'll keep driving with these very old ones.
My 2 cents.