There was a 1963 press photo of Coombs sold recently on eBay, but I could only find a Worthpoint listing, so the image is small:
Don't know why the ".45s" on the cap is blacked out.
At least one other image exists, as a "Retrocards" set was made for the 1963 Colts, and Coombs has a card, but the only image I could find of the card is just a thumbnail:
Still, better than nothing, I guess. I think it's a bit unfair that Coombs (and Joe Hoerner and Jim Dickson) were not included in the pictures of the "All-Rookie Game" of September 27th, 1963, as they pitched in relief of starter Jay Dahl, because they were all rookies, too. (It was the debut game for Coombs and Hoerner; Dickson had debuted in July.) But only the starting 9 made the pictures.