The polling firm implicated in the campaign against Irwin Cotler did work for at least 39 Conservative candidates in the last election, including Andrew Scheer.
A Citizen analysis of Elections Canada records shows that Campaign Research was involved in at least 39 candidate campaigns during the spring election, and was paid nearly $400,000 for the work. Not all Conservative candidate returns have been filed so the figure could be slightly higher still.
As @kady notes, one of the campaigns that used Campaign Research was that of the same Andrew Scheer who found no breach of privilege. His campaign paid more than $8,000 for their services in aid of his run for the roses in Regina – Qu’Appelle, before he was elected Speaker. Scheer does not appear to have mentioned this in his ruling or, uh, anywhere else.