These may not be the correct color and the drain may not be in the right location, but it's a start:
https://www.trekwood.com/products/45...kirt-Clay-CGCB
https://www.trekwood.com/products/45...-Gen-Clay-CGCB
BEWARE: Pricing for parts from Trekwood are somewhat competitive, but their shipping and handling charges are some of the most OUTRAGEOUS in the industry !!!!! But, you might find what you need there and nowhere else, so pricing may be hard to swallow, but if you need the part, choking might be your only alternative.....
You can give them a call and see what they might have available or can special order for you.....