Check out the packs from F-Stop, if you haven't already.

I use a Loka with medium ICU for my Hasselblad outfit: 500 C/M, 2 backs, 3 lenses, extension tubes, teleconverter, spot meter, pro hood, tripod, etc. If you have more kit, you can use a larger insert, although that won't leave room for much else. They also make a couple bigger packs.