I'm not defending Norm but at the same time, he isn't in the parts business.
Now I know you may say "But wait, that's what he's selling...car parts." They may be parts that go on the car, but they're not car parts. What Norm has is a cottage industry level production house.
What we think of when we think "car parts" is like Autozone. You go in, a part that is built at an assembly plant (somewhere in the world) is sitting on the shelf waiting for us to buy it. That part is going to be the same as the thousands of others that company produces. If you get it from Texas or Arizona or New York, it's the same part. Every time.
Norm isn't like that. What he does is build fiberglass artwork for cars. Now, I'm not sayng Norm's stuff needs to be hung in the Louvre in Paris but rather that these items are crafted, by hand, and have to be to Norm's level of perfection...like an artist doing a sculpture. There may be small irregularities from part to part but nothing you would see without careful scrutiny.
Unfortunately, like most artists who are REALLY good at their craft, business skills seem to be...well, an artist's business skills are probably equal to a businessman's artistry skills.
Norm has a horrible problem with proper forecasting of completion dates and that trait is fairly well known in our community. Johnny's six year wait though seems to be WELL outside the window of acceptability though. If I were to be ordering items from Norm, I'd take his time table, add a year, and that's when I'd be expecting them based on past history. If you're not willing to accept that kind of time frame and the fact that you'll probably be needing to follow up with him on a regular basis sometimes without response, you may want to rethink your decision. It is what it is.