Hello 2sweed, I have extra wide feet, so I always have problems finding a 13 extra wide in most outdoor stores around here also. I am beginning to wonder if shoe manufacturers just avoid producing many of them because of the extra material that it takes. I have to wear steel toed shoes here at work, and it's a pain in the rear finding extra wide. I have looked on the Internet at some sites, and when I select the extra wide on some of em, it shows being unavailable. I recently purchased a pair of hikers because they were my size and on sale. All the other brands on sale had no extra wide, and most of the others that were not on sale didn't have any either. But what few that had EW cost a premium.
I guess if I was going to do some major hiking like several days out at a time. I would start months ahead and hit the internet, and expect to have to return what doesn't fit (maybe several times), and expect to pay a premium price.
The wider the shoe the more material especially the foot bed and sole, and maybe different tooling and fixtures that are not as versatile as a reg size fixtures. Maybe the wide width are not as profitable to produce? These are just my theories. I work for an automotive parts manufacturer company, and every aspect is scrutinized and explored for cost savings. Right down to reducing an 8 hour shift to 7.75 because we don't get paid for our 20 min lunch.
I could go on but I won't. Like I said just my theories.