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It's usually smaller than burritos and the skin wrap is thinner. I don't think you can get the skin wrap easily in Europe but other than the wikipedia, you can refer to this recipe for the stuff that goes into it.
http://www.kitchenbowl.com/recipe/J6ZJ5yYsNk/fresh-spring-rolls-popiah-
Maybe you can substitute with a thin wrap/pita bread .... unless you think you can do this I found from youtube.

now that is REALLY thin

Usually we need at least 2 pieces and over lay most part of it.
Sometimes, it there's damage, people add one more piece.

is it similar to those rice cakes you use to wrap up crispy aromatic duck?

It's quite similar but still thinner.

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