I just updated Big Feet Big Problem - Shoe Shopping For The Outsize with a section devoted to all the wonderful custom-sized slippers and shoes that can be bought via Etsy. Go forth and enjoy!
Whilst searching through 4o-odd pages of shoes to find the custom-made ones, I discovered NDEUR Shoes, which feature handpainted designs. Wow. They paint on vintage shoes which I expect means standard sizes only but you can also send them your own shoes to be decorated, although it is still quite pricey - US$200! I think on my budget I'd rather give my sister £5, a brush and some shoe paint, and I probably would if shoes that fit me were more commonplace!
I also think these are lovely, and these Miss Bunny Skull Wedges and Heart and Sole Wedges are fantastically sweet and gothy, although I think anyone wearing them would need to follow the stripy tights guidelines, if they didn't want to look too baby batish!
Anyway, I'm going to return to lusting after these...