No, you will not get xyz's data second-hand from ERI. There are a lot of good surveys out there like Culpepper's; everyone should participate in as many of the best ones as they can. Please help independent salary surveys stay in business! The handful of comprehensive surveys listed here last year that remain standing have shrunk even further now. Too few surveyors still survive today and our tradecraft requires multiple robust sources. We need more surveys, not fewer.
ERI does hundreds of its own surveys each year covering all industries and locations but does not use anyone else's data without specific authorization as identified in our publicly disclosed Methodologies. As discussed in detail here, no other enterprise's proprietary survey numbers are input to ERI Assessor databases. Nevertheless, we do list multiple other surveys which may be of interest to users who want a narrower focus although we expect that our unique updated consensus estimates from multiple sources that are reported from the 10th to the 90th percentiles will provide more comprehensive reach than a survey drawing from a more limited observation sample. That said, ERI does absolutely no consulting at all and only publishes the most current pay and living cost information on a subscription basis for professional tradecraft use: all customers get exactly the same products because they are designed for universal applications. ERI can't do limited narrow exclusionary samples like a specific 12 enterprises in an industrial park of 20. Use your consultant for that, especially if they focus on a narrow industry subsector.
It is virtually unheard of for a reputable pay survey firm to willingly voluntarily turn its pay survey data over to a competitor for resale or rebundling. Why in the world would anyone commit economic suicide like that? Ask your salary surveyor to share its data collection questionnaire. If they can't show their reliability statistics and regression analyses that prove they have real observations to count and update over time, their figures won't meet the Daubert Standards for expert witness reliance in federal courts.