It's important to tell us wich car 'cause shock travel are very different in a B13 than a B15 or others.
I've got H&R springs with tokico's, the better shocks available here (Mexico City) when I got these, but due to the small shock travel it bumps a lot with any mayor back load.
Order at
http://www.motivational.net Koni bumpstops & rear shock mounts, I'll do next time I went to USA.