I've gone to the Denver one each time I've gone there. Excellent service, excellent people. Infact I just bought a new door there for my Bronco today. I bought my new front-clip from them too a while ago. They seem to have everything you need. Only thing I couldn't find was a Ford emblum. Heh. They're pretty good and charge decent affordible prices
Both places are the "real" thing. The Aurora location is the "wharehouse" so to speak, and the Denver location is the "showroom". From what I understand, the vehicles are in Aurora, stripped, and the Denver location is stocked provided they have room. You can call them (either location) and tell them what you are looking for and they will tell you what location it's at.
Been there and done that. A lot of fresh trucks in weekly. Make sure you bring the part you need, don't just show up. Makes your visit 100% better. Both locations are real. At times they seem like different places. Best parts place, start here first.