zanderman112 has taken the FC09 update.zip that was found on Google's servers and created a CWM flashable zip that will upgrade your EL30 modem to FC09. If you are currently on CyanogenMod (or any other mtd ROM), you will need to use the CWM5 BML kexec zip file found in this post.
There has not been much testing as far as stability or performance on this modem, but if you would like to try it, here it is!
Please note, if you decide to use the delta zip to upgrade your modem and you experience strange issues, you should assume your modem is corrupted and Odin back to EL30. From past experience of delta flash upgrades EC05->EI22->EL30 it seems modem corruption happens 10-20% of the time, even with pure stock phones! We have not seen any real difference with FC09 modem, so if your existing EI22 or EL30 modem is stable, you may be better off keeping your modem. See this post if you need to flash the older modems.
If you are on the FB15 modem, you must use Odin to load the EL30 modem if you want to upgrade to FC09 modem.
Download EL30 to FC09 delta
Mirror:  | 
Please reply in the comments or on Google+ with any issues you may have with the zip or with your experience with the new modem.