Good start again Richie. I attempted a go at this, in my early model building days. Being short of funds (on account of only being in my early teens) and suitable models ( on account of living in a provincial village without a proper hobby model shop nearby), I made do with what I had....
I happened to have Airfix's Monty' Humber Staff car, which looked similar, and this was riddled with 'bullet holes' and substituted, and I think I used some Italeri Germans, crudely heated and bend into "shape"....
.
No incriminating evidence of this butchery remains...
Looking forward to seeing your progress, I've packed all my stuff away, as we are moving in the new year. I have just finished a Bronco 17 pounder, and procured a part build (cheap
) Morris C8, to convert to the Airborne version. Still to decide if I'm going for a large diorama of the landing grounds, or a smaller one in Oosterbeek.