They make coilovers for many different cars. I already saw their Nissan/Honda/Subaru products being sold in USA. So if you run a quick search on the web, I am sure you'll be able to find an importer/distributor who can get you Elanra coilovers.
well i didn't find an exporter but i found out that they are the same as ksport coilovers. they have a us branch so i looked into that. here is what i got. http://www.ksportusa.com/products/ksportkontrolapplications.html
so they may fit the elantra with the same issues all tib coilovers have with elantras. comes with all the goodies tho. and kinda high on price. but the best looking coilovers if that counts for anything.