Not sure you still need it, anyway, i have 1 used unit which is in tip top condition, no leaks or whatsoever, taken out as I no longer using it (opt for wastegate). Bought brand new from Tong Turbo in April 2005. PM me if you're interested. Thanks.
there are a few solutions for RB coilpacks misfiring problem,
1. splitfire coilpack
2. buy new standard coilpack from nissan original parts
3. buy kedai potong coilpack
4. run coils from other cars (example - mitsu...