Thanks Wally.
Interesting that the RL is a very early one (in fact, pre- or very early production, judging by the high headlights). Now I look, of course, rather than working from memory, all the RLs in the manual and user handbook photos have them, of course being early ones as well. Just skimming through a Google image search for RLs, they look to have been deleted by about 1958 or earlier.
The Martian appears to have double mounts, front and rear of the hatch. I see what you mean about the Ford one!
Don't go out of your way, but I'd be interested to see the Militant one if you do find it.