If you don't mind tinkering a little (rotozip will suffice), then would recommend using a Cooltube along with the
Adjust-A-Wings... will need to adapt the CT to fit the AAW... some simple metal cutting and rigging w metal screws...
The AAW is by & by far the best horizontal reflector I've seen up & running. My buddy has one & his footprint is super wide... pretty cool. The cool tube will allow you to vent it is all. BTW, the AAW & it's spreader may reduce "hot spots" but the bulb still produces all the heat, so venting is likely necessary.
I'm vertical personally, so an 8" CT is all that is used... something to think on perhaps. Peace!