Both my front bearings are ****ed too. You dont need a whole hub though mate, you can split them down. Im having a hard time trying to find new bearings though. S14 and S15 are both the same. I had one front bearing off last week and they are 34mm internal. I got some from ebay which were supposed to be the ones. They turned out to be 38mm.... rage.
Yeah I bought a second hand hub for 15quid from a 14 for now. But i was messaging a few eBay guys in America to try and find a bearing alternative! Surely someone must make that bearing! Japan maybe??
James can you get mitto to ask a few of his friends in Japan? Also Nissan will use this bearing in something else surely? So maybe cross referencing the bearing with another is one is the best option. Easier said than done!