J.,
My son who is now 5 has had wide feet since an infant. I used to buy his shoes at Stride Rite until I found the shoebuy.com website. The wonderful thing about Shoebuy.com is that you get free shipping to/from the company so if they don't fit, you can send them back without any hassle. If you need to return them, you just print out the return slip online, attach it to the box and drop it off at any UPS location.
If you go on the shoebuy.com website and sign up for membership (it's free), you will receive 10% off each order. The 10% comes off during the checkout process. Also, they run regular sales, so I always google shoebuy.com coupons before I buy anything. I usually buy shoes when they either have coupons for 20% off or $10 off $50. That way, I get the coupon, plus the 10% membership discount.