Although the XL-330s can do Velocity Control mode, at present (May 2022) there is NO WHEEL part for it . Fortunately, I just found that I can mount the Horn that comes with the XL-320 onto the XL-330. Just make sure to align the XL-320’s horn’s key-slot properly on the XL-330 motor shaft. You will need to use the original “black” screw that comes with the XL-330.
Thanks to the rivet holes on the XL-320’s horn, I can now mount DREAM type or BIOLOID STEM type wheels onto an XL-330.