Narrower track width on a franken'510

[snowball]

My Datsun 510 is running S13 lower control arms, hubs, brakes, ect.

But the track width is wider than in the rear. it's also rubbing the fender lip. A bonus would be being able to fit more than a 205 on a stock rim up there.

Is there a lower control arm or something else on the market to narrow the width.

couldn't find any firm info searching around other than going to s14's would be even wider.

http://i.imgur.com/cmscs.jpg

http://i.imgur.com/tekfx.jpg

http://i.imgur.com/bR4sS.jpg

http://i.imgur.com/WvUEx.jpg