Looking for a replacement shade for this lamp

https://preview.redd.it/egjyuis6crbf1.jpg?width=901&format=pjpg&auto=webp&s=5ee48610a9b8e8df1250f03b7353f09ba28518f0

This was my mom's lamp, a 19741 L&L WMC. She loved this thing and my niece accidently broke the shade about 10 years ago. I'd love it if I could find a replacement shade for it. I'm searching online but if anyone has any leads for me, I'd appreciate it. Thank you!