Old thread, but just now caught it.
Yes, 1/76 figure availability far outweighs what's available in 1/72, IF one does not count the plastic sets from different mfrs, such as Airfix.
I did, in the past, do 2 small dioramas, for a few 1/72 armor kits I had done. I did not want to use plastic figures, so I used several 1/76 ones, that were already in poses I wanted. The scale difference was a bit noticeable, but not bad, and most who saw, didn't notice. Just don't mix figs from both scales,
Jim F