In reply to mike25350:
As a retailer it can be pretty hard to get a supply of larger mid range shoes, the notable exceptions we've found have been the ocun ozone plus (plus means wider not better), and we've had a few satisfied larger footed customers with Tenaya Masai that go to a larger size well. Worth noting your La Sportiva Tarantulas will be altogether different to all the other shoes in their range - they're made on a different set of lasts in a different factory and continent to all the other sportiva shoes.
Obviously your best bet is to find somewhere to try them on, although a good quality online retailer will give good service and free exchanges if you have the patience to shop that way and can't find a range to try.
Just had a quick look through what's available in the mid-technical range for us to purchase as a shop - we can get 4 pairs 'off the shelf' from suppliers without having to forward order, the Tenaya Masai, Ocun Ozone Plus, La sportive Finale (up to EU 38) & Edelrid Typhoon which I expect will come up small, all of which we can easily get in 12s & 13s so it may be worth looking for those first. We can generally get hold of 5.10 in a 12 easily across the range but higher than that is hard work.
Have fun searching
Oliver from Three Wise Monkeys