Back at the '80s, there used to be an arcade game/cabin called Star Wars, which featured a unique control, known as the Star Wars yoke, which resembles pretty much a gunners control. Well, sort of, a few keys are missing..
Unfortunately, the particular controller has not become popular with other games, so original items like this are quite rare (and expensive) and third party copies not available.
Several individuals have tried since then to replicate such a controller, many with quite a success, in order to make a usb controller to be used in custom gaming computers. There's even a 3d sketch for it available, which with some edit for more buttons, palm switch etc., could be used to serve the needs of the gunner position in SB..
Check out the sketches here: http://forum.arcadecontrols.com/index.php?topic=133656.0