Certified Gluten-free Oat Flour

I didn't realize that this product existed until I started Googling tonight.  I thought one had to order Bob's Red Mill certified gluten-free oats and grind one's own (what a job!).  Here are links I found for gluten-free oat flour:
Legacy Valley  - Amazon
Actually this link will give you access to several places to purchase certified gluten-free oat flour:
 Cream Hill Estates
AND Bob's Red Mill makes certified gluten-free oat flour.