Should be Faaie yn Oe - my partner and I had fun pronouncing that in daft Scottish accents. Wasn't sure about the capitalisation since the sign is in block caps, but that's what iMuseum uses:

https://imuseum.im/search/collections/people/mnh-agent-1308191.html

The iMuseum is the digital archive of Manx National Heritage (a body of the Manx Government established by statute). It's a resource I've used a lot when reading about local history, though I don't think material from it can be used in an open source fashion. Unsure about verification purposes, so will leave that for more experienced folks to determine. Some info regarding that here:

https://www.imuseum.im/imuseum-faqs/