You might do a search on obituaries and see if some one shows up that had a towing business.
I would ask the local body shops and wrecking yards, someone might know the owner, that truck has been used in recent years.

1954 Chevy Half-Ton
In the Stovebolt Gallery
More pix on Shutterfly
More pix on Photobucket

1958 Chevy 1/2-Ton Stepside
In the Stovebolt Gallery
More pix on Photobucket

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"Time's fun when you're having flies." ~~ OLD FROG