Frequency divider IC

The hittite IC company makes fixed dividers that operate at 10 GHz or so. I have not used them but have found that every product from them that I have used was better than the data sheet numbers.
http://www.hittite.com/index.cfm?bod...source=leftnav is their selection chart. Note that they have dividers for prime numbers like 3 and 5 also as well as a 5 bit settable counter.

Fujitsu MB506 is inexpencive and up to 2.4GHz, you can try and with this chip.