Plus size Goth and Steampunk retailers:
Fat Chic search for plus size gothic clothing
Fat Chic search for plus size gothic bridal wear
Fat Chic search for plus size corsets
Brute Force Studios and Fallen Angel Fashions
Gothic leather and corsetware. Also a source for corset making supplies.
Domino Dollhouse
Punk pinup goth craziness.
Holy Clothing
Offers sizing up to 3x.
Hot Topic
Extremely limited plus sizes; pseudo goth/mainstream wear.
Little Red Mischief
UK Gothic designer that uses plus-size women as models and US sizing system.
MGD Clothing
Goes up to 3x in off-the-rack; also has a menu for custom fits.
Persephone Plus
plus size clothing with waist going up to 52 inches
Venus Clothing
Sizing up to 30/32, with mix of gothic and “slinky” wear
Punk.com
Once in awhile has clothing in plus sizes; unique punk looks, sometimes high-end.