One more thing to consider. For a short time, the 4/4 had an 1800 Zetec. I would have to look up the years, but this was around the time of the Runabout, so early 2000s.
Budster has this engine as I recall, and it's only a few bhp behind the 2L Plus 4 Zetec, and probably the best 4/4. It will also be within budget if you can find one.