Hi, Nancy's Notions carries generic presser feet. Her web site is nancysnotions.com and her phone is 800-833-0690. You need to know if your machine requires a low or high shank foot. That means how high the foot attaches to your machine.
Have a good time at your class. Just remember that machine quilting isn't learned in a day. You need to practice, practice and practice, but it's worth it.