I bought a front cast from Stormrider about 4 years ago and had it sitting in storage while I moved around the country, and finally, finally got around to putting everything together. I didn't have a fantastic budget to work with so I used an old door frame from a home reno we've been doing and build out on top of that. I also wasn't going for complete accuracy for the frame -- I wanted something low profile so the depth is about half of what it typically would be and that suits me just fine.
I also got a light cluster from Fettronics but ended up not installing it (PM me if you're interested in it, I have no need so can swing a really good deal on it).
It was a fun project, thanks for looking!