Here's all I could find on it, but I do believe David. Might find out more knowing it was actually done by Faller. http://davidksmith.com/postage-stamp-trains/chapter-8.htm
This is a blast from the past... offered by Aurora around the same time as the Postage Stamp Trains. Once in a while some of these items would show up at the infamous Two Guys from Harrison After-Christmas Sales but they were never at the same quantities as the N Scale trains. (Nor did they generate the same level of excitement.) The reproduced photo on the DKS webpage cited above shows to me that the bus is not exactly N Scale, and the proportions with respect to the other items I still own that are also in the illustration. (The "Bus Stop" kit seemed really oversized for N Scale! It was priced as low as 49 cents in Two Guys, though!) Like much of the non-train material marketed by Aurora, the bus system was OEMd by Faller.