Question Mitre-Mite VN42 Air Leak

[hatterphoto]

Dealing with an air leak on v nailer. Photos attached. The air is leaking from the small slit in the box circled in blue. V Nailer is still operational but compressor is having to run more than it should. Suggestions or location to get parts?

Thank you.
-Chipper

 

[cvm]

That's the pressure regulator. You can get that from Fletcher for like $100. Just make sure to mark the ports .