Same here ....
I'm using a thin piece of Stainless steel and custom-made a shield to protect the upwards heat.
available from B&Q for a couple of quid
( You'll have to excuse the messy bends, these were taken before I trimmed it down )
Then I used a hole cutter to cut out a hole underneath for the air feed..
If you can use the OEM feeds then that will improve cold air flow immensely.
And with a bit of twiddly work, you can get the pipe to stick out at the bottom front.
( Again, photo'd before I removed my chicken wire
)
Andi