Wanted to get back to you regarding your request for a photo showing the RAF badge being worn by USAAF personell. Here is a photo taken at the air base of the 4th Fighter Group at Debden, UK. Left to right in the photo are 4th FG pilots Chesley Peterson, Oscar Coen, Don Blakeslee (CO) and Roy Evans. They are talking to (far right) General Ira C. Eaker, on one of his visits to Debden. As you can clearly see in the photo Peterson, Coen and Evans are wearing their RAF 1942 Badges. They are worn in the usual (preferred/official?) position, on the pleat of the right breast pocket (centered). It is also interesting to note that Oscar Coen is also wearing his Caterpillar pin just above the badge. Thought you might like to see a photo with multiple personell wearing it.
p.s. All four pilots pictured are former Eagle Squadron members.