Aside form a custom door, consider going 'standard height' and 'boxing' the dead space. If you were talking about bi-fold doors in the dining room, or something, I'd say go custom. Or, if you were talking about 'restoration', I'd say go custom. BUT, if I was you, which I'm not, but if I were, I'd box it out and go w/standard doors. For a closet, it doesn't sound like it's worth the $$$.