The Piper breeches don’t fit me either … snug through the butt and hips and gap hugely in the waist. Durability-wise, mine have lasted a few years, but then again, I usually only wear them when all the ones that fit well are dirty!
Smartpak used to make a “higher end” breech called the Alexus that was much better material and fit well (although the sizing did run big). I wish they still made those.
I ordered a new lead rope a couple months ago from smartpak … I chose the one I did because it was specifically advertised as having a solid brass snap. It showed up in the mail and while the rope part was fine, the snap was clearly not solid brass but instead one of those cheap brass-plated deals that seem to be all you can find these days. Needless to say, a couple months and a few baths and nights outside later, the snap is now rusty and a PITA to open. I wish someone still made lead ropes (other than leather shanks) with real brass snaps. I’d gladly pay a couple extra dollars for not having to deal with annoyance of rusty snaps.
I personally have to find some brands that are affordable and halfway decent. If people keep sharing their knowledge, the affordable options can come to light and we can save our time sending stuff back 
