My list:
Dr. Denis McNamara’s list:
- www.google.ca/shopping
- http://fluminalis.com/index.cfm?page=inventory&cat=5569&name=Inventory-New-Arrivals-and-Added-Items
- http://www.churchantiques.com/new-products/
- http://www.dcriggott.com/about.php
- http://churchantiques.com/
- http://www.andythornton.com/en-UK/products/architectural-antiques/church-fittings
- http://www.usedchurchitems.com/
- http://www.rmills.co.uk/churchstructures.php#a19
- http://thechurchking.com
- http://kingrichards.com/
- http://www.fynderskeepers.com/
Prodigal Catholic 
You can always try http://www.fynderskeepers.com or http://www.tbchurchsupply.com