Hey Rob,
What you are asking about is called Large Format Printing.
You could try Unicom Graphics, at Alberta:
http://www.unicomgraphics.com
or the University of Manitoba does LFP for people:
http://umanitoba.ca/faculties/archit..._printing.html
Do you have a specific size you need? Some vendors on ebay do smaller versions.
I bought a product from one that does up to around 3mt by 1.5mt. Possibly more, but that's largest advertised on ebay.
The retractable devices can be bought seperately, and you load own material easily, or most print businesses will have that as an add on cost. Don't know if the Uni print shop has this ability though.