Marimba/Vibe cart is made for your specific instrument.  The frame is constructed of 1 1/2" square tube so you can easily add accessories using standard percussion clamps.  Height is adjustable and held in place by four heavy duty 1/2" bolts.  Large 8" no-flat swivel caster make the cart easy to pull over parking lots and grass fields.
 
Given the difference in marimba and vibes, dimensions will need to be verified when order is placed.