I've just bought a pair of (checked as genuine) NGK B7ES plugs. I've realised they are long reach plugs so not correct for my iron head engine. The pair of plugs cost me £8.22. If you will donate a similar amount to this forum I'll post them to you, (at a UK address).
I'm currently using B6HS plugs in my GF. Although the bike goes well, those plugs are usually sooty when I check them. Would you recommend getting hotter plugs than the B6HS?