Ducting would be the way to go. You could even make the ducting cover most of the HS to force air flow through all the pins.
Code:
_,.-~*+--+
+-----------~*` | |
| |f |
| duct |a | side view
| |n |
+-----------.,_ | |
__#######__ `*~-.,+--+
+---------+
| ||||||| |
| ||||||| | rear view (behind duct)
| ||||||| |
| ||||||| |
__#######__
If you catch my drift