1988ish Chevy longbed pick up truck cap?

Hi,

 

I am trying to replicate a truck for a friend and am in need of a pickup truck cap for a 1/24th Chevy long bed. Does anyone make a resin or aftermarket item or something that can be modified without too much trouble?

 

Thanks in advance, Steve

Source: http://cs.scaleautomag.com/SCACS/forums/thread/1017605.aspx

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