If its just the injector seals leaking then check out the DIY in my sig and do it yourself. However, its common for old GTR injectors to leak through the body, which you'll see as wetness on the injector body. I had 3 doing this, so I got a set of new 550 seimens for ~600 (ebay, from US), but of course you need to have an aftermarket ECU to run different injectors. If you're strapped for cash, just do the turbos and live with the leaky injectors a bit longer (keep an eye on them tho).