Modding the Marder-II, you mean? You're well aware that what is left of the program is a field trials testbed rusting away in a tank museum?
If so, alright, I've included it in my mod, so I guess I could send you an obf including it (worth noting that
all of the data is guesswork or extrapolations, so not necessarily worth the bother). I've icons for it too (see "Proposed/Failed Program Icon Submittal Thread"), and you can find a decent lbm already in the game (number 44068).
But if you can find
real data for it, feel free to create one yourself!