Any idea if the Rack and Pinion unit on Forenza's/Reno's is the same as the one for Chevy Optra5? The dealer quoted me $1700 to replace the assembly which is leaking

My mechanic can't seem to find the part anywhere in Canada and I only seem to see the one available for the Suzuki models online... I know the parts are pretty much identical in both cars but my Optra5 has no SSPS?
Any info would be much appreciated.
Thanks,
Alex