The Versa pulleys will need purchased from Vex Robotics.
@Halbj613 haven’t a clue about the Matrix II.
As for the 3ds drive I suspect an adapter or modifying the hub could be possible.
These wheels are positive offset. Meaning the load center of the wheel rests within the outside third. For this reason it requires more spindle area to accommodate the drive.
Here are the dimensions for the drive and front hubs.
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