I've got 3 Native Pony Co saddles for my Fells and I love 'em! I have heard mixed views on using anyone other than Andrea or Dean (who run the company) to fit them though. I'm probably going to get another one for Emily, but I'll send my template directly to Andrea rather than get a fitter out (did this last time and got the perfect fit).
I have a wide working hunter saddle from SOS Cornwall, I use on my section C stallion, it is fab for all showing because it is straight cut but still has a deep seat, so when cobs are being cobs (if yours is anything like mine) you are still so secure. You should check them out, heaps of people ask about it!