Thanks guys for the accolades. The PVC piping is basically a couple of angle pieces
and then two 3" gear clamps that have a rubber bushing to seal the gap. The partition is basically aluminum coil that I had a friend bend on a siding "brake". The Brake just folded the edges over to give it more strength. If I remember correctly, the partition is 15" long. The end near the strut is around 12" and near the rad it is approx 9.5" It may not be a perfect seal but just find some car door weatherstripping and it'll be close. The hole for the intake piping is just lined with clear tubing cut in half.
I used brass screws in holes I pre-drilled in the front beam/rail (?) where the bottom of the partition rests. There was a brass angle bracket you can see in the pic to support the top.
The partition has a 90 degree angle on the base of it. The base is approx 2" wide. The brass screws then go through the base into the front beam/rail.
Phew... I hope that helps.!!