I found a minty Prowler from eBay for $3.99 and couldn't pass it up. When I got it and thought about cutting it because that's what I do ! Immediately figured it needs a roof. A PT Cruiser came to mind, so I looked for a picture of each on the web. Loaded up Photoshop and this is what was the result. I will always like a coupe better that a roadster. It does look like a 'natural'. I found a PT Cruiser on eBay, built but not painted. Very simple kit, I took it apart with my fingers.
These are the two photos I used to make the Photoshop bash. I first looked up the wheelsbases of the cars to match scale. They were 113  and 103. I adjusted the PT Cruiser's scale to match the Prowler. I then overlaid the Cruiser and rotated it to match the beltline of the Prowler. I erased eveything on the Cruiser except for the roof and trunk. I made the chop to fit and changed the color and contrast to match.
This is the 'layer' of what's left of the PT Cruiser. The PT was photographed from a slightly lower angle so I tinted the windows to hide this. I also adjusted the door post to match the Prowler. It turns out to be a 5.5" chop.
The SnapTite built kit I got for $4