I must have downloaded the track from racecarcentral.net.
I have a screenshot of the dl page crediting the track author as "dodge" and the track dl as modified by "burnout", (was/is ?) the forum administrator.
I remember "dodge" did quite a few tracks, IIRC they were fictional tracks, although I'm not recalling specifics.
After some digging...
I do have a post from Piggz Racing thanking him for Piggzville Park and a racecarcentral download page crediting him for Piggzport Infield Road Course VERSION 1.1.
Also, a credit on Twin Ring Motegi (along with 3 others) as Brandon Kilgour (Dodge) and his email is listed in the readme (dodgeracer{at}gmail{dot}com).