I had an issue finding Tokico's too.
Struts/shocks will be specific. A lot of people on the forum (including myself) have gone with the KYB AGX, as it is basically a damper-adjustable upgrade to the stock suspension. It can handle up to a 1.5" drop from stock spring height. (Tein S-tech is 1.4" drop so you will be fine). Any lower, cost goes up; you might as well get coilovers.