It is possible, but fortunately still exist countries like Ukraine, and produce old diesel engines for trucks (KRAZ) and for tanks (T-64 line, including T-90, and also used on military trailers like MAZ-537, so when you cannot visually see, you don't know if tank running itself or on trailer).

Main problem, in those countries have not managed to produce small diesel engines for light trucks, and KRAZ engines are something 6L or more (tank diesel are 10L).

I hear they made half-block near-flat modification for armored personnel carrier, and even used it on low-floor city bus, but as I know they was not much market success, so have not produced big series.