Bah humbug on a manifold - anything which is not submerged is just a way to lose heat. The easiest way is to perf some foil and simply lay your HLT output onto the top of the foil...easy...lemme repeat...easy...
I reuse the foil over and over until it becomes a pain to reuse...did I mention easy?
I definitely agree with you, Mike, but it sounded like the OP wanted a piece of gear. Anyway, what do I know about fly sparging?