A quick look at "that auction place" and I found 2 of those old kits, One for $29, and one for $75. (Yeah, right!) Hendrix Man. resin has one for $30 with no work. I bought one and I'm very hapy with it.
Years before the Del Ray kit came out I kitbashed a Revell 56 Nomad with an AMT 55 sedan, and I only had a little molding work on the rear quarter to do. it also came out very nice. I then put the Nomad roof and tailgate on an AMT 57 hardtop for a great Nomad, so that was a two from three build.
I know this is not a popular thing to say with the "Another 57 Chevy" complainers, but there are still MANY tri-five Chevys that never been kitted or need to be re kitted. The old Monogram 56 Hardtops are so out of proportion that they look like cartoons.