I don’t always trust Ebay for authentic parts but it depends on the selle. I’m seeing a lot dealerships on EBay now.
Northcoast Subaru is a good seller on Ebay and good prices on their website.
Shipping is always a problem for one or two small parts. Not cost friendly. Local pick up from local dealerships can be good but sometimes you have to return if it’s not in stock and prices can be higher too. Most dealerships charge full MSRP or more.
rockauto.com is your friend. My wife also has a Fozzy although a tad older than mine. She backed up into a pole and cracked one of the lower bumper reflectors. $10 USD later and a trip to rockauto.com all fixed!