The best option that you have would be to source a N15 Pulsar VZR gearbox & driveshafts (you will need them for the LSD).

It had a shorter final drive which helped with acceleration.

4.44 final drive.

Your best bet will be on EBAY.

Unfortunately, the final drive will not swap over to the Sunny GTi gearbox, unless your gearbox is already equipped with an LSD, which I very much doubt that it is.

Quaife do not sell gear kits for the FWD gearboxes, only the GTiR gearboxes and those gears won't work with you gearbox.

You also have the option of a PAR gearset, in which you can specify the ratios that you want, but it is really expensive, like £3000...ouch.

Hope this helps!!!

Cheers

Dave