Chinook RV

The bathroom fan cover on my 2003 Glacier lost the battle with a storm. It was broken into tiny pieces. Does anyone know where I can find the correct replacement? I can’t seem to find one and would rather not replace the entire unit.
Thanks for your help!

This one fit for me. 2001 Concourse: https://smile.amazon.com/gp/product/B00 ... UTF8&psc=1

Thank so so much!