A cassock and surplice. A proper surplice, down to the ankles nearly with the points of the sleeves touching the hem.

I got sidetracked here for about ten minutes while my imagination ran wild. Then a few more minutes got spent beating Catholic guilt into submission. Then more minutes imagining.

I also like the idea of using the word "source" but it sounds less... inviting, less friendly, than "fandom". Ficdom? Sourcery? (Sorry, couldn't help myself.) But I know what you mean: fandom has specific connotations and not everything falls into the category. < / entirely unhelpful post >