Wow, a soft top Viewt, I've long wanted one and I've scoured the jap auctions for a manual one without success in the past. I'd be a bit surprised if the drive shafts are different but then the headlights and many other bits are, including the engine management system so it's possible...but why bother to make the track just 6mm wider? I know the front subframe crossmembers are the same because I welded one into my last car.
When I bought my first convertible March, a mate who runs a garage had just scrapped a 1.3 micra so I thought I'd grab a load of spares off it as it had been run by an old lady who did no miles but had it regularly serviced till it rusted through the rear suspension arms! One of the bits I took off it was the alternator but when I compared it with the March it was smaller - presumably the cooling fan and aircon is on a lot more in Japan so the bigger alternator is to compensate. I didn't look at the connectors but as there are usually only 2 contacts (1 big one to the battery often via a fuse, and 1 small to the ignition light), it shouldn't be too hard to modify. Are you sure the alternator is gone? Alternators usually rely on the current through the ignition warning lamp to start things off, they don't start to charge if the bulb has gone, otherwise I'd take it apart and see if the brushes have stuck.
I got my hood cover from Car hoods Northern ltd, originally they told me they would fit my old glass into the new hood but after they had had the car for a few days they said the new hood came with a plastic back window so it was too late by then. It took them 3 goes to get it waterproof but in the end I was quite pleased with their service. There is a trimming company in sheffield run by a nice polish guy who will make a copy hood and stitch in your old window but they charge the best part of two grand!. To import this car (my 6th import) I used Sayuri for a change to do the Japanese side of things, they offer an after-sales part finder service. I can't remember the exact price but the original Nissan hood supplied by them would have ended up costing around £2.5K after shipping and import tax. Then you still have to fit it which I'm told is not easy. In Japan most people use Japanese Yahoo in stead of ebay, I've known people buy obscure car parts off there using an on line page translator so if you're not desperate you might find one using that rout eventually.