Actually, Abbyshot is doing that one along with their coat, so I don't think Magnoli should do it.
In my opinion at least, the only one worth doing is the one from the snowmen and nightmare in silver with the floral pattern on it. It's a distinct, but simple and repeating design that is hard to find an alt for. If Magnoli made that one, then the only bow ties that would be left would be the one off ones in Cold War and The Name of the Doctor. Those are sort of simple bow ties you could probably find alts for, I know I found one for the Cold War bow tie I really like.
For example, I was thinking that one of these with the blue embroidered over with a sort of brownish gray color thread would be a good alt for the name of the doctor bow tie.
http://www.ebay.com/itm/BF4001B-Nav...777178856?pt=US_Mens_Ties&hash=item56540ac2e8
And it's cheap, so it can't hurt.