Array curves between curves or 3d shape?

 From:  Matadem
11839.1 
Hello
if I have 2 curves ..the top and the bottom are 2 different sizes...how would I array the shapes between them? even if they are not centered.

and if I have the same situation but in 3d ...so if I have boolean the shape out of a block/rectangle...how would I get the curves between them...?

Tnx!
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