The only pictures I could find from 1957 for the T100RS are these two articles from CYCLE magazine. It was a updated version of the 1956 TR5R and was sold from 1957-59. I don't know if there were any other pics or info published in the Motorcyclist or other motorcycle mags from '57.
Winner Ed Kretz Jr. on what appears to be a box stock T100RS. If you have any info or parts for one of these rare machines contact Wes at Four Aces Cycle as he has one that he is collecting parts for.