I'm thinking about buying a repro Air Grabber box kit from PG Classic.
Anyone have one? How accurate are they? Not going on a concours car, but a real Air Grabber Road Runner that is missing the airbox
thanks

Look for an original one.

Does anyone make the three parts for a 69 Plymouth hood?

BEA and PG Classics sell all 3 pieces, but even Mike Ross will tell you that they are only O.K for driver quality cars. The finish is clearly different than a factory box and the fitment of the outer boxes leaves a lot to be desired.

They come up on ebay pretty often. I think there's one on there now.

Purchased one two years ago for the exact same situation you are in. It fit perfectly, both together and matching up with the original mounting holes in the hood. Great value. Finding an original and then having to fix all the broken parts that come with most of the original units I think sorta loses the "originality" look. 99% of the population couldn't tell the difference. Important to me, car originally had the code, you got one on there.