Replacing an engine for Revo from gas to diesel is this possible?

Hi guys! I recently bought a 2nd hand Toyota Revo 1.8 gas with automatic transmission for a very cheap price, after a few weeks of driving it I realized that the vehicle is not that fuel efficient however I love the ride as the suspension, under chassis and everything still feels new. I was thinking has anyone here tried replacing the engine of a Revo from gasoline to diesel, I tried looking for diesel engines at sulit but cant find any. Is there any shop that sells diesel engines for a Revo and if there is how much usually is the price? also if replacing the engine is possible will there be someone who will buy my gasoline engine even for a very cheap price or just swap my gasoline engine then I will add cash for a diesel engine?

Thanks in advance for any replies.