Voyager wireless rear view camers

The voyager wireless rearview camera that was oem with the newer Airstream trailers are advertised as water proof. Well they last about 1-2 years due to taking on water. They are expensive to replace with a new one. Especially since it's likely to have the same issue.

Can someone recommend a replacement camera that works with the voyager monitor.

The model is WVOM541AP