2003 to 2016 was the First Generation, curved door. Similar to my 1977 Trillium.
2017 to Present, Second Generation, flat door.
The earlier models pre 2010 are pretty rare. Escape only produced a few trailers a week, at that point. Production increased notably around 2015. In 2017 there was a 15 month waiting list which brought on a major expansion.
Good luck in your search. If an older model comes up, it's likely to sell quick.
2020 Escape 19 still in Chilliwack
Trailer #6 was a 2007 Escape 17B
2019 Toyota Tundra 4.6L 4X4 DC
Following TravellingRobert on Youtube