Jumping in. I too am in the grip of dungaree mania. I am also big of bum and thigh but small of waist so have stayed away from them for years...BUT, I saw a woman (maybe 40's, elegant, svelte) wearing some. She looked fab and I had to go up to her and say so. Turns out they are from Zara's current autumn range (none left in my local one but have ordered 2 sizes to try online). She told me they are a dupe for a Valentino pair (who knew?!). You can see them here. I would never have looked at these, but they did look really nice on. It remains to be seen whether I will get away with wearing them though...
Also love these from this US blogger, but sadly they are not current and seem to be sold out.