Have found myself in a similar position, all the following assumes you're using windows as you desktop OS...
To double check your recovery is broken, get into fastboot mode (power on while holding volume down), use volume down to highlight "hboot" then press the power button to select. Then press volume down to highlight "recovery" and press power button to select. If that works, then recovery is fine, just go ahead as you normally would to recover the system.
If you can't get into recovery then you have a slight problem.
Since you can get the device into fastboot mode, the priority is to get it to talk to your PC. Get the device into fastboot (power on while holding the volume down button). Once you're into fastboot, plug in the USB cable and verify the connection to your device using the following command :
This should show you a single entry for your device. If it doesn't show anything, then unplug the device, download the naked driver pack (available at http://forum.xda-developers.com/show....php?t=1161769
) and unpack it into a sensible location. Plug the device back in, if it can't install software automatically or nothing appears you may have to use device manager to update the driver for the device. Find its entry in the device tree (it will probably be listed as an unknown device), RMB on its entry in device tree then select "Update Driver Software..." from the menu that appears, tell it to search automatically then point it at the location where you unpacked the naked driver pack. That should sort out any misconceptions windows has about not being able to talk to the phone.
Once you have fastboot access, you can reflash clockworkmod. You can obtain the latest version here : http://forum.xda-developers.com/show....php?t=1594819
flash from fastboot using the command
fastboot flash recovery recovery-clockwork-touch-22.214.171.124-endeavoru.img
Once flashed, unplug the usb cable.
Use the volume up and down to highlight "hboot" on the fastboot menu, then press the power button to select. Once in the hboot menu, scroll to the "recovery" menu item and press power again to select. You should find yourself in familiar territory at this point.
EDIT : Sorry, it's nearly 2am here, I'm very tired and I've just re-read your initial post. If you've flashed a custom kernel then you MUST have fastboot access (or it's subsequently broken). Download your ROM (if you haven't already got a copy on your PC) and extract boot.img from it. Get into fastboot mode (vol down + power on) and plug into your PC. Do the following :
fastboot flash boot boot.img
fastboot erase cache
Unplug USB cable, use vol up/ down to highlight "REBOOT" then press power to select.If you get stuck in a bootloop, you can try going into recovery via fastboot (select "hboot" from the fastboot menu then "recovery" from the hboot menu), then select "erase cache", then go to "advanced" and "wipe dalvik cache". Then go back and reboot the device. See if that helps. If not, then go back to recovery using the aforementioned method and re-install your rom, then erase cache and wipe dalvik cache.