OK, so I googled up this lot. Our client's in Thunder Bay, so that's why:
Based in Thunder Bay:
tbayit:
http://www.tbayit.com/webhosting (~$12/mo. linux, sitegeek.com rating 40/100)
Sencia:
https://www.sencia.ca/web-hosting (quote requested, hosted in TB, Linux?, not rated)
tbaytel:
http://www.hostingbythebay.com/cgi-bin/select.cgi (~$20/mo., Linux?, sitegeek.com rating 40/100)
Other:
http://www.hostupon.ca/canadian-cloud-hosting.php (~$25/mo., CentOS 6, no Exchange, sitegeek.com rating 65/100)
https://www.webnames.ca/hosting/web-hosting ($8/mo. linux, sitegeek.com rating 45/100)
https://www.bluehost.com/shared (USA-based, UT/MA offices, sitegeek.com rating 77/100)
This is like trying to pick a wine from the label!