Well, with plastic rod, strip and card, maybe some stretched sprue, I'm sure you can fabticate some convincing gantries/stands etc. Just measure up around the area you want to place them, and make them 'to measure'.
Of course, there would have been 'standard' pattern servicing platforms//equipment, but, who's going to have those patterns today? And, especially with such types as the 'Cat', operating away from major servicing Base Depots, such aids would more than likely have been assembled from materials available, at best, welded or bolted tube, made in the Engineering Division. If anybody asks what type of stand it is, your reply would be something along the lines of "Field mod 36A, type 2B, with modifications from Pattern 2(c)4D, Cheyenne Modification Centre, 1942............!"
(Hides stupid grin!!)