You'll find a number of kernels if you look in the Development and Original Development forum sections. But unfortunately, nearly all are for Sense and GPE ROMs, and won't work on AOSP ROMs like DU and CM. On that note, since AOSP ROMS use different kernel(s) from Sense and GPE; you already in fact have tried 2 different custom kernels.
If you still want to try different kernels, what you can do, is take the boot.img from another similar base (same Android version) AOSP ROM, and flash it using fastboot. Such as the DU kernel with CM (or Slim kernel, etc.). But honestly, I have no idea how much the devs tinker with the kernels on these AOSP ROMs.
Be sure to make a TWRP backup of your current ROM before flashing a different kernel; in case it doesn't work and things go south, you can easily revert.