I think your best bet would be to source Japanese parts.

The guy galcrazi is referring to that has a Turbo starlet is actually one of the earlier, rear wheel drive models. That probably won't relate too much to your car.

I'm willing to bet you COULD use Tercel parts, since I'm pretty sure they share the same suspension design.

My advice to you would be to get a set of coilovers, made to fit a Japenese Starlet, or, call up various companies (Tein, JIC, etc.) and ask them about how much it would be to get Starle parts.