I feel your pain, finding coats to fit our pear shapes is a trial to say the least. Many coats this year in the UK also seem to have very narrow arm holes which added to trying to fit my larger hips and smaller waist has made coat shopping veeeery depressing!!!!
I stumbled across the following coat when not looking, I was in an outdoors shop with BF and I got bored trailing round after him so wandered off mooching.
Before you open the following link it's expensive, double my budget, but it's a perfect fit, so I've decided to do without the knee high boots I was hoping to get. The puffer detailing is on the inside so from the outside it looks like a normal coat.
http://www.draussen.de/app/sto.....38;lang=EN
Huge apologies if it waaaaay off budget x
ETA The German one is ever so slightly different to mine. The UK one doesn't have the belt at the back x