I don't think there's any kit other than sourcing out European parts. Some late Eurovans overseas did have nav units that we didn't get.
You could *carefully* hack your existing trim bezel that's around the climate unit and cut off the storage slot but IDK how it'd end up looking. Might be better to source out the European bezel from a double-din vsn (see below).
But your real problem is inside/behind the dash. There's a brace going across the car and it is in the way of most double-din anything (the depth is severely limited). You'll need to swap to this:
But some inspiration for you...a top of the line Caravelle "Business" edition: