For the girls in the UK we have an excellent source for wide shoes and boots to size 10 (12 US) in most of our towns called "Evans"; the wide ladies sizes virtually match the mens sizes over here.
They ship worldwide too....
I've not found a store that isn't trans freindly yet, the shoes start from as little as £15 ($22) for pumps and a pair of calf length boots I bought a month ago cost £30($45).
...Also if you still are too nervous to ask to try them on, many stores do pairs on hangers so you can look bored and grab your size in "boy mode" on a busy day, and take them to the checkout for "The Girlfreind".....wasn't that sweet of you to buy them for her
Exchange and refund is also good if you find the size wrong afterwards (except sale items).
Chrissty