Well, I kinda agreed with Apophenia that the Farallon Air Force didn't "need" a Travel-Air based fighter, with the Wedell Wasp. BUT, I thought, why not. Here is the story (thanks to Apophenia for the inspiration):
When Lance Margon approached Jimmy Wedell about adapting the Wasp racer as a fighter, he had already had some experience with this process. Three years earlier, Margon's predecessor, Francois Pickering, had negotiated the purchase of three Travel Air R Mystery Ship racers from the USA. These had been used for experimental purposes mostly, but were used in a major propaganda campaign to try to fool the Tripolitans into believing the Travel Air P (as it was designated) was in wide spread service replacing the Capstan-Boeing Bullocks. In reality, only the three were ever in service, and one of these was destroyed within a few months. Lance Margon had been the pilot of that P, and had lost his left foot in the crash! The Travel Air P's each had one .30-caliber machine guns installed in a pod under each wing, with 210 rounds per gun. The Travel Airs were never very popular, being considered fast but fragile. This reputation was partly responsible for the strengthening program of the Wedell Wasp, to avoid a similar reputation.
Shown below is the second of the three Travel Air P's, 3-F-55.