Big Bike Shoes

I am new to the sport and have been putting off purchasing road shoes since I am having difficulty finding any that are my size.  For running shoes I wear a size 15, but I can usually get away with 14 for my day to day shoes.  Since I'm new to biking I do not want to spend a ton of money for shoes however shoes I do find in my size are usually very expensive.  To top it off I have called the LBSs in the area an none of them carry my size so it looks like I'm going to have to guess at my size.

Anyone else have big feet?  Any suggestions?

Thanks

Kevin