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2003 is the start of the 9th gen Corolla and 1st gen Matrix/Vibe with "newer" 1ZZ-FE engines. Though there are a few cases of oil consumption, even with the 9th gen Corolla and 1st gen Matrix/Vibe - those occurrences seem to happen considerably less often than in the earlier 8th gen Corolla/Prism.
If you opt to swap in an engine, probably smarter to grab a 2003+ model - will generally have less miles, doesn't take them much time to swap your good bits over to the new engine, and typically not known as the "premium" or more desirable 1ZZ-FE engine on the pick-and-pull places.
Keep in mind, that just running a newer engine doesn't mean that sludge/oil consumption will auto-magically go away. Even the best engines will die, if their maintenance is not kept up on. There are still quite a few 8th gen Corolla owners with some decent amount of miles - that have not seen oil consumption issues. Most of those owners keep up on maintenance pretty regularly, so they catch issues before they cause bigger headaches.
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2002 Corolla S, 1.8L 1ZZ-FE VVT-i
2003 Matrix XRS, 1.8L 2ZZ-GE, VVTL-i (RIP)
2009 Matrix XRS, 2.4L 2AZ-FE VVT-i
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