What scale? If you're looking for 1/35th, Tamiya has a couple of German armor vehicle crew figure kits (an old kit with 3 or 4 figures, but the quality won't be very good. And a newer one, excellent quality, crew figures are at rest, but the commander figures could easily be modified). I am sure DML/Dragon has some figures that would suit, or not be far off the pose you want. Or you can try the commander figures included in most tank kits.