2021 AS Nuevo ES leak through nearside locker

I bought a used Nuevo last week and I have found water getting in through the Thule locker door. It's the one to access the nearside under seat storage. The dealer offered to replace the door, but the replacement won't have the AS decals. The seals are wet so I'm assuming they are the culprit. Do any of you guys know where I can get some replacements? Many thanks.

Correction Thetford not Thule. Now I'm searching correctly, I've found one on Ebay.  Sorry for my error