Here are a pair generic white drl's with amber indicators for sale, they are pretty hard to dimension so I will do my best so all measurements are approx.
L 255mm, W 30mm, Depth 25mm one end and 20mm the other.
As you can see from the pics they are slightly curved (10mm ) in the middle.
looking for around £15.
They would look quite smart blended either side of a 7 nose cone.
(http://s21.postimg.org/h3e6ou8g3/20150205_211349.jpg) (http://postimg.org/image/h3e6ou8g3/) (http://s4.postimg.org/a5c101imh/20150205_211750.jpg) (http://postimg.org/image/a5c101imh/)