Here's one. I've seen others.
He's actually charging $50 though:
" The cost is NOW $40.00 for a full 3G remote flash........
When you get your device go ahead and connect to wifi and update to 4.4 before flashing or Rooting and Unlocking the Bootloader......
Root is required, I will send you FREE Instructions how to obtain Root and the Bootloader Unlock.
If you cannot do this step I will Root and Unlock the Bootloader also for a $10.00 ADDITIONAL FEE..... "