There are some great suppliers of bow ties available on the net... I would encourage you to look at some -- eBay is always a great source for them. I've bought many that way. With the amazing variety out there, I'm certain that you'll find one (or many) to match your outfit perfectly.

In recent years, especially this year's St. Andrew's ball, I've eschewed black bow ties completely because I've grown to associate them with these cheap, pre-tied things that are essentially handed out at each and every formalwear hire shop in town.

Lol. I suppose that just as many of the rabble get their hackles up over white hose for that very reason, I've developed a bit of a dislike for black bow ties.