https://www.amazon.com/gp/product/B0719QHBHC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 heres one from amazon for $14 that I just bought
There are $10 ones from ebay but aren't from professional plant sellers
https://www.amazon.com/Pilea-peperomioides-Chinese-money-Pancake/dp/B0719QHBHC