zxtman, since you asked about what I came across, here is what I found. I asked my gf if she had time if she could ask these guys if they do still produce the kits. As far as I know from looking at their website they do. The name of the company is Super Star Aero. Here's a direct link to the page showing both a front and rear bumper. http://www.super-star-aero.com/page010.html The front bumper of the S130 is on the 2nd page, first row and third one in the row. The rear bumper is on the first page, 1st row and on the very right as well. They also make side skirts and a rear wing too.
The contact email listed from the page is super-star@a.email.ne.jp and their number is 0120-82-1286 and fax is 0120-831-86. I couldn't find a location listing on the page, and since my keyboard doesn't type in Japanese, I'm limited in my google search and on Japanese car forums about this company. To the best of my knowledge, they are the original company making the kits.
Sorry if this has been a repost as stated by another member before, but I figured if one person wanted to know the info, that's good enough for me. Cheers.