where in the U.S.A to buy parts four coil overs

[effvee]

Good morning, I'm trying to find in the U.S. a company that sells parts were you can mod your own struts; for a coil over application. Here's one in the U.K http://www.rallydesign.co.uk/. I think I read where they don't sell to the U.S.due to possible liability issues.