The Vita cart is most notably thinner than a Switch one, so reduced that space by 1mm. Different shape at the top to grab too, so made the slot 1mm less deep to maintain your ability to grab it easily.
No actual picture included, but I did actually print it and test fit it, it's just visually indistinguishable from the parent model.
License - I was forced to select GNU because I remixed something marked GNU. But the original mushroom is a CC. If authors change theirs back to CC, let me know and I will synchronize this one. This also prevents me from listing the original mushroom model in the list of associated models.
The author remixed this model.

Reduced slot for cart by 1mm in height and 1mm in thickness.