Any highly recommended custom maps?

[Droopy]

ModDB IS essentially the "Mod Database"
It was the first place I check for mods for any of my games, it was also the first place I checked for custom stories for Amnesia before finding my way here.
It has a much higher hit-rate than these forums I imagine, plus, showing off your custom stories to other Amnesia modders can be good for constructive criticism, but ModDB would provide you with more praise from people who are more interested in PLAYING the mods (your target audience).