I look for an unidimensional, short version scale for retailer/company reputation, that could show discriminant validity with trust measures. I've already seen Cohen (1993) and Fombrun et al. (2000) measures, but do not fit with my research project.
This reference could meet your expectations "Ganesan S. (1994), Determinants of long term in buyer-seller relationships, Journal of Marketing, 58, 1-19."