In all honesty i would be very worried if you mounted it inside your lamp assembly and then suffered salt corrosion? That would mean the lamps are being splashed with water internally. Not advisable.
You can get suitable boxes from many hobby electronic stores online.
The LBF-AP does come with its own housing but does not have 0-Volt switching, which the EVG-AP-2F does, hense the reason for PCB module release.
An argument that can go on forever, but as I say as with all GHL requests, they all are looked into. This is what makes the GHL such a great community, all working together.
You can always post your request in the suggestions thread