i love the coat! im the same way about blankets, and I thought it was only because I ride LOL. I dont think I will ever get my pup a blanket with arm sleeves lol-- where did you get that btw? The local tack shops have them, but they are full fledge blankets (like down coats)... and are expensive (like everything sold at a tack shop hahaha).
(oh sorry i didnt see that you already answered my question----- do you know where i can find them online?)
and guys if you want to try to find them a little closer to home (car drive) take out your yellow pages and search tack shops. Depending on where your located you should have a few. Call them and ask if they have blankets that are dog sized. (and you might want to ask them to give you a price. )