One of the projects I did on the side a while back was made a tubular rear bumper for my Miata with a trailer hitch. The hitch was used to tow extra wheels and smaller items on a little trailer for track days that I did with the Miata.

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Using Solidworks, I drew up the design of what I wanted the rear bumper to look like.

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I laser cut and welded the brackets to the rear and added some dimple dies to take away a little material without compromising the structural integrity.

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I set up a stand at the right height of the car and used a tube bender to get the shape of the rear bumper and compared it from the top.
 

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I added two additional support bars underneath the tow hook just to help with the weight of the trailer.

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(Semi) Final result from the top with the hitch in the receiver. This was before the lower support bars were added.
img_81311600cc powerhouse, who needs a truck?