Thank you for the response.
That's what I had expected to work, but it doesn't. Selecting the Macros "table" gives you the &Email macro as an option, but not &WebSite. I tried putting &WebSite (and several variations) into the Expression box, but never got the data back that I know exists in Contsupp->Contsupref. I thought I might be able to add a new "Macro" to that list, but haven't found any way of doing that either. I ended up writing an external ASP.net & SSRS application to build a custom report for getting the data.