IIRC, (and this is strictly unofficial because I don't remember the years all of the various engines came in these unholy pieces of poo), Rafa is correct. In other parts of the world it was the lancer platform, and *THEORETICALLY* should share similar engine mounting points and such.
With that being the case, you have some options:
1. 4g63 - My personal fav. Non turbo blocks can be had for cheap, ~160hp dead nuts reliable (if you maintain the ******!) and plenty of parts if you know where to look. Turbo blocks are slightly more expensive, but in stock trim can handle upwards of 400hp with enough fuel and a good tune. Also of note, if you were to go this route, get the "6 bolt" bottom end from the early 1g eclipse/laser/talon or the g63b from a d50/arrow/mightymax/sonata/elantra. The later 7 bolt blocks have thinner rods and a really nasty problem with crankwalk.
2.4g37 - Another good motor. When compared to the 4g63, this motor looks like a POS at first glance, but they are reliable as hell, can handle well over 250hp in stock trim, and are SOHC non interference motors -> which makes for a good motor to be beaten on. Aftermarket support sucks, but parts are reasonably cheap.
Hope this helps.
Edit: I looked around, and I was wrong in the years. Old mirages (89-93) work with the motors I mentioned, but the newer ones use mounts that are basically "mirrored" from what I'm used to working with. However, it looks like an EVO 4-9 motor would fit, you'd just have to figure out the tranny