If they did it wasn't included in dossier (you're free to prove otherwise), and thus irrelevant.
Entire dossier was published by Buzzfeed, it isn't some secret material.
And because Russia wasn't angle seriously pursued by Republicans, as far as we know, thus they couldn't have much. Unlike Clinton Campaign which quite liked this angle - and so Fusion GPS hired private investigator with Russian/Intelligence ties - Christopher Steele specifically to pursue that.