One low tech solution,

Use four4 1/4 inch pieces of aluminum tubing about 3/8 inches long as
standoffs, use four stainless steel screws, make a small stainless steel
plate and screw this onto the bottom of the fuselage to act as a heat
shield.   You could also attach some fiberfrax with glue on the stainless
steel side facing the fuselage.  It is out of the breeze, under the plane,
no one will see it and it works very well.

Bob Smiley
N94RJ