Hi David, and thanks for your post and question - it's a good one! Although I am not personally familiar with the "Wizard' brand, I think I can help you. Generally speaking, mouthpieces for nebulizers are actually the same size. If you have an extra package of the nebulizer kit, with tubing and hoses, the mouthpiece should be interchangeable. If not, you may want to reach out to your medical supply company for additional assistance.
Please do check back and let us know how this all turns out for you.
Good luck!
Leon (site moderator COPD.net)