Been trying to find a kit myself. Hopefully one day soon, someone will make a 48 scale version.
I do know there are a couple conversion kits out to convert one of the Academy B-17s into one. I also know of a 1/144 scale, but for the life of me cannot remember the name of maker of either one.
It was made by a small outfit in Florida named Stratomodels, a resin kit. I could only find a couple of references, but it doesn’t sound worth looking too hard for. Sorry, Stratomodels.
I have that Maquette kit too. It comes with what I think is a Frog B-17, which I scrapped and replaced with the very nice Academy Colin Kelly c/d kit. That one has the right cowls and props too, for the prewar version.
If the shape is wrong, I’m going to live with it. John Eaton laughed at me, but what’s a fella to do?
The biggest problem I found was that the two fuselage halves did not match. I would either have to put a LOT of putty on one side, or sand the too-big side a lot, which would give the fuselage a lopsided cross-section. One side is taller than the other by a significant amount.