Taken from the last GPL archive we got for v2.0.9-hotfix.2.
Keep in mind that while there have been new firmware versions, it doesn't seem like UI has done any changes to the kernel that we know of.
So if you're looking to do some changes / enable modules for your device, this source tree should still be okay for v2.0.9-hotfix.7 (and possibly the v3 RC as well).