I vary from size 10 to size 11. It could be worse. But yes, it is hard to go shopping for shoes. My mom and sister both have the same size, but they wear leather (yuck!). It was hard when I didn't wear vegan shoes, but now it's harder that I nead both big and vegan shoes.
I'm thankfull that I have a Pay Less Shoes Source near my house (in the mall), unfortuntly, there style this year includes a lot of leather and fir, but in the past (and hopefully in the future) they had almost all non-leather, and a lot of large shoes. Also, it was nice last year, because some of the shoes ran extra large, so I was able to comfertably fit into a size 9 1/2, which hadn't happend since I was 12. And, they have shoes sorted by size instead of style, so that it's not as painful (I hate to go into a store sorted by style, find a vegan style that I really like, and it ends up not in my size!)
Plus, they have the buy one get one half off almost every day. There shoes arn't even expensive to begin with.
But if shoe shopping is really painful, why not order shoes online? There are vegan shoe websights.