Veteran DB1 owner in the house... Only 1 (possibly 2) company(s) makes a "lip" kit for the DB1. It's Kaminari and i think some knock off place
www.versusmotorsports.com sells it individually. Unfortunately the sides were discontinued but it has the hardest to find piece and that is the rear. You can use EK 4 door side skirts with some trimming or DC sides. Wings west i believe makes a side skirt for it also. For a front lip you can choose a crap load...
www.jdmcarboy.com. Purchase from jdmcarboy at your own risk. I've heard mixed reviews about them.
Now... The lip spoiler. Thats going to be a little tough. It's a rare discontinued item. Pay close attention to G2IC's for sale section, It will take awhile but with patience it'll pay off.
Any further assistance you can AIM me. Haystacklivin510