Is the Isuzu Amigo still for sale?
Yes. You can find the Isuzu Amigo at the Honda sale dealers.
I'm not sure about a 2000 model. but I just put a 2.8 liter turbo diesel in my 1989 amigo with very little fabrication. Alll I had to do was reroute a few hoses and build an exhaust system. The Isuzu turbo diesl 3.1 liter out of the Isuzu bighorn is most likely to fit in a 2000 model. I know people have done it before.