I don't know what level of cue you're interested in, but I may be able to offer some suggestions, albeit not in Canada. The Billiard Warehouse has production cues and provides GREAT service
www.billiardwarehouse.com . No worries dealing with them. If you want a fine selection of used high end cues, take a drive to Detroit one weekend and make an appointment to meet up with Jesse Nikon at Ball, Cue, and Brew, in Lincoln Park, Michigan. He always has new McDermotts, Vikings, Lucasis etc. , and a fair selection of used great cues like Scruggs, JossWests, Blacks etc. You can try anything out there before you buy it on a Diamond Pro, or a bar table, or a Dufferin 6 X 12...nice feature. You can even play with the new cues with special chalk ! The number is 313 381-7665. The area is not far from the Ambassador Bridge in Windsor/Detroit, has many reasonable motels, restaurants, bars etc. Everything you'd need for a cheap weekend excursion. I'm just a satisfied customer and go there to play once in a while, not promoting them. If you were coming I'd be willing to help if I could. Just PM me.
Also in Michigan, although on the other side of the state, there's always Seyberts. Great selection of production cues and cases. No problem dealing with them...in person, online, whatever. They are the oldest, the best, and the largest dealer of Predator stuff in the world I think.
Personally, I think you're at the BEST place to buy a custom cue. My favorite sellers include Bamacues, Lenoxmjs, and Jazznpool ie:
www.westerncue.com You can deal with any of those guys without any reservations. I understand that shipping to Canada can be a slight problem, but each of those dealers are familiar with the routine. I hope this possibly helped...Tom