I just finished running 1" vinyl tubing from my AC vent in the dash, along the side of the center console (concealed by the console cover) into my center console "glove box" where I have my Travla C134 mounted along with an XMPCR receiver and DC-DC PSU. I have a Sequoia so the console has quite a bit of room. I also added a +12V fan underneath the box which pulls air out the bottom and blows into the passenger area (no noise tho).
Result? Before the AC fix the C134 would heat up to 70+degC (CPU temp. read with Motherboard Monitor) within about 10 minutes. Now, it hasn't exceede 52degC after 1 hour of travel. It's working very well so far.
Some people have experienced condensation problems. I'm keeping an eye out for this, but haven't noticed anything yet. It could be because I park the car in the garage at nite instead of leaving it outside.
Hope this helps!!