Illuminas were never popular for 1Gs - are they even available for his car?

And I don't know why you'd go to a speed shop for stock replacement items, unless you make too much money. You can buy the KYB GR-2s, which are stock replacement shocks, in lots of places. They are the same as the OEMs.

For stock springs you could try picking up a second-hand set from another DSMer who changed to aftermarket. Other than that I'm not sure, aside from a dealership or a junkyard.