I think marvin is talking about one he saw in Japan.
I've searched for YEARS for a north american manual car- both Canada and US, which has turned up nothing.
One source claimed everything was set up, but no manual cars were ever imported here.
for more details on the manual rack, check my build thread.
I've not read but the last page of this thread, so dunno how this affects 'S13 Rack Conversion.'
I have seen on Zilvia I think it was an aftermarket quick-ratio manual steering rack for S13's. you may choose to hunt there.