Yes, I knew them. Pete and Julie Riolo owned Bronco Parts from probably the late 80s/mid 90s? until Pete retired. Then his son Dan took over and ran it for a few years. I think it went out of business around the turn of the century. Pete and Julie were very nice people and contributed items to our Stampede raffle for a number of years - I believe they have both passed on now.
Their specialty was original type parts - they used to have more of the OEM-type wiring harness replacements, for example, than another other shop at the time. When Dan took over, he branched out more into the aftermarket modifications like suspension lifts, power steering conversions, disc brake conversions, etc. They were always a much smaller shop and didn't advertise as much like Wild Horses, Tom's, JBG, etc. I have a hunch they struggled in the economic upheaval after 9/11 (like K Bar S) and didn't make it. One thing I just remembered is that Bronco Parts was the primary dealer for Hanson bumpers back in the day.
I was looking through a few old photos not long ago and came across some pictures from a run that ACB did in '96? when Dan and his girlfriend joined us. It was an overnighter and we had a great time with them.
I still have at least one of their catalogs in my collection too along with a decal on my toolbox and somewhere I probably still have one of their t-shirts too. They used to give out little pocket calculators with their name on them and until recently I had one of them in my glovebox to do gas mileage calculations. I think the battery finally died in it.
Hope that helps.
Todd Z.