What is the specific need for these fans? We can help you better if we know how and where they will be used. Are you sure that the fans need to be 84+ CFM....how did you come up with that exact cfm requirement?
I have spent many, many hours looking at fans of all sizes and specs and suggest that you will just need to do some looking as well.
These are a few of the more shopped sites from most of us here:
Newegg, Jab-tech, Performance-pcs, FrozenCpu, Directron,...and other sites as well.
I do most of my fan buying from the first 4 sites..but you never can tell where you can pick up a good discount on a particular item.
Some of the most popular and dependable fan makers...in no particular order...: Coolermaster (one of my favorites),Scythe ( also one of my favorites), Yate Loon, EverCool, Thermaltake, Panaflo, Antec, Nexus,...and probably a few other makers of quality fans with fairly reliable specs.