Where to buy an adjustable coilovershock kit

Hi..

Anyone knows where to find an adjustable coilovers that slides over your OE Struts (to lowered your car/picture attached). It was a dress up kits consist of a lowering springs and a billet threaded cylinder complete with locknuts.

I've found one chinese made in Old Salata road but sadly it was for Nissan Maxima. Do anybody knows where to find a shops in Doha which sell those items for many japanese/european sedan models?

Or is there any shops can import the items from overseas if it was not avaialble here in Doha. Much appreciate if I could get the phone number also.. please let me know, thanks..